Assuming this will have enough power, I think its a fairly good option, the whole project will likely cost around $100. I think our boat weighs roughly 3500 lbs. Not sure, though.
The reason we got it for $25 was it just stopped running, and taking the gas out to get it in the basement solved the problem- the gas was REALLY old, and had completely turned into varnish. So, off the tank comes for cleaning.
The mock-up of the front caster.
Now we just have to wait for it to get warm enough to weld.