I think Kitno  has the answer Fiz!

We had a similar issue with our last home.. 5.5m Commander Approx 1300kg on trailer. A 55m drive, then a tight S bend.. then could maneuver the boat in beside the shed with tne big horn.. on a 7 point turn..IF stuck every marker point from S bend correct...

 We tried a Honda ATV.. but had traction issues on the concrete when backing and turning the boat into beside the shed.. and not a tight turn.
The neighbours little digger worked a treat on the digger arm as did the bobcat with ball on the front.
 The old bradford with tow ball on tne front worked ok, but was a bit hard on the clutch to do too often.

In the end we got an old Yamha14 hp tractor unit..that used to be a lawnmower, then used to launch boats at the batch sort thing. Some traction issues but an extra person sitting on the mud guard helped, and the very low gearing got around the turn uphill. $150 off trademe.

Now moved we still have the tractor, dont use it.. has leaking axle seal and brakes has always been but dodgy. The low gear ratios sort that out fine.
Engine fires every time

 We looked at the movers but like the ATV get a slight slope and turn going up huge traction issues.

You will be suprised thu If with a bit of practice (lot fishing trips) if figure out your markers , when to turn and how much, hit them each time spot on , just howceasy it can get to back a boat into an awkward place.

Here has taken near on a year to back up drive, on the right line (wrong line by 350mm will screw up about 3 stages ahead)
Start turn slow when Im nearly at front steps, around a blind cnr,  slowly  increasing the turn,
Mmiss the garage window with trailer lights by 100mm (I did break it a while back) on the blind side (right)..
Start to straighen the trailer at a mark on the fence.
 Carefully watch the front fender doesnt hit the fence.. (150mm)...
Back up till level with cnr fence on the truck.
 Make sure jockey wheel down facing the right way , so boat rolls backwards about 100m when unhitched..not sideways into the bumper.

What you use to back up with (tow vehicle ) makes a huge difference.. IE a bighorn or SSangyoug are shorter distance from ball to rear axle and have excellent turning circles.

My grandfather modded his ute with a drop in tow bar on the front for maneuverability of trailers an boat.

Steps wrote: Here has taken near on a year to back up drive, on the right line (wrong line by 350mm will screw up about 3 stages ahead)

Luckily mine is generously wide and pretty much straight, just long and steep for the first half. But Im still expecting it to take a while whether reversing or putting a tow tongue on the front.

I think the easiest way will be to drive it up and unhitch it in front of the garage, then turn it around 180 deg and with manual dolly like the one Unc inkked start pushing it toward the Park A I want to use, I can then reverse the car onto it and reverse it into place.

A bit of fluffing about but that will be the least fluffing, but still plan to practice reversing it up the drive and maybe getting a second front tow bar in time.

Did Practise make perfect for you Steps? :-). Here is hoping for me.

Moots wrote: $300K below RV - is that the expected RV in 2030?

 

One just will never know what 2030 will look like until we there, this year already had RV's scrapped by council, although they are expecting median to be $3m by 2040 (they being some RE economists)

End of day, MV, or what you personally perceive via much current and historical sales figures to be Market Value that is far more important. RVs should not really be used in Real Estate propaganda but they are. And many people try to sell property based on this inflated figure. Is ok in a bouyant market but the last 4 years prior to covid have been an up and down seasonal change but overall flat line.

If extending the garage out to double would add value I would do it. :-). 

I reverse my 4.6m tinny about 50m up my driveway, that includes an almost 90 degree bend 2/3 of the way, up a steep slope the last 15m and then a neat little kink into my property. Practice makes perfect and I've only hit the fence at my property entrance once in 15 years.

Nothing to add except the force you need to apply will be boat+trailer weight times the sine of the angle. 15 degrees sounds excessive. That’s almost a 1 in 4 slope. About 26% of the weight required to push it assuming the surface is smooth and no friction. Buy with that in mind.

My grandfather modded his ute with a drop in tow bar on the front for maneuverability of trailers an boat.

That applies to duel axle..
 which I should have mentioned in post above..
Putting aside traction issues
The digger  we could lift weight off the front wheels and then turn like a single axle.
 The bob cat could either lift or drop the ball height , also putting the trailer as if a single axle
The little yamha tractor, fixed height, we made so front axle was not quite on the ground.
You do not need the tyre right off the ground, just enough to have  most of the weight off it

And a side note, one can change a rear wheel , sometimes by dropping the ball/ jockey wheel , but may not be enough (doesnt drop to the ground)
 And Can change a front axle wheel by lifting the jockey wheel...but may not be enough to slide it on the studs pumped up..

Also if thinking on a duel axle , increasing towing weight on the ball, moving the boat forward often makes no difference. Issue usually is the ball height on the tow vehicle.
One can move the boat/ load forward an inch, with only a 5/10kg increase if that... but increase ball height 35mm will change from around 12kg to 85/90 kg

Changing hitch height makes some dramatic differences in reversing , and hitch weight
 Even choosing between lifting front or rear axles makes, but less dramatic , difference in how turns revering

Oh another thing espec on duel axle trailers, is the rear wheel alignment..should be neutral to toe out, not in like the front axle. The rear axle is your 'steering' axle  when reversing.

Just a bit of stuff/ info some ppl  may like tuck away for future reference.
 

I can post questions if I like, if you dont like it, simply dont read them, block me from your viz. Digging up 1 extra post made within the space of 4 days to prove a point is just miserable and negative/pointless. 

Again, to the positive people, thank you for responding with a lot of extremely helpful posts. This will be useful for other people in tight parking areas.

mate are you on shore ... if you are. I  can come round and give you an opinion based on having a few boats in family over 35 plus  yrs plus, including one same heavy 16 footer f-mker stabi (luv her)  for last 20 yrs. I sort of know this stuff. It’s actually mind fk if your bit uncertain.

Good on Fiz for asking the question. A driveway like that can seem a bit intimidating if you haven't attempted it before. Personally, a little stabi like you mentioned, I'd just back it all the way up.