Where to start?
My old azz eliminator day cruiser is supposedly a 3800 lb hull, per Eliminator. Then add a 454 and pump (650 lbs?) and (2) 25 gallon tanks, and all the BS for a day on the river, I'm guessing at 4800 lbs?
Bigger boats need bigger impellers. Mine runs a AA from American Turbine. It's slightly larger than a 2A from Berkeley.
With ~500 HP, turns the AA to 4950-5000 rpm, at a blistering 57 mph, going up river, with 3 others and myself. Would probably hit 60 by myself and minimal fuel.
Tows grandkids on inflatables easily, and a 275+ lb single skier without hesitation.
Floats in ankle deep water (avatar pic)
Big enough for Mohave, but easy enough for the river at Bullhead.
Dan'l