This boat:
https://www.pursuitboats.com/OS325_25.php
14,000lbs dry, it'd be 16,000 full of fuel (1,000L = 1,000kg = 2,000lb). And I'm assuming that excludes the trailer weight.
Would you pull it with the M5, or is that not in the same location? The M5 would easily pull it.
I wouldn't pull a boat down the road with a skid steer. Ultimately the issue people are chasing is ability to stop it, not ability to pull it. Stopping things means either wiring up the trailer brakes, or having enough weight in your tow vehicle to stop it. A skid steer isn't heavier than a tractor, I'm not convinced it would stop the boat any better. And I don't imagine a skid steer being able to run trailer brakes. I'd get a tractor that can drive the trailer brakes (particularly if your ramp needs you to put it in deep), or I'd get an older F350 dually.
This thread seems relevant:
https://www.thehulltruth.com/boating-forum/301701-pursuit-3370-weight.html
Of course, in my part of the world people use bulldozers, that'd be pretty hard on the road and the ramp, but definitely would stop it.
There are only a few places in New Zealand where boats are launched by bulldozers, and Ngawi is probably the most iconic. About half an hour south of Martinborough, this quirky fishing village is a…
buggeritweareoff.com
This one focuses on the bulldozers:
These are kind of background
Ngawi, Palliser Bay, New Zealand.Old bulldozers sitting right on the pebble beach. Rust glowing orange under hard summer sun. Deep blue sea just metres away....
www.youtube.com