Sounds like a lot of labour which would make this project a labour of love. Well built boats are both woodworking and art when done well. The skilsaw may be drawing too many amps which might drop the voltage too far down for the saw to work. The high amps/low voltage will cause the saw to heat up and premature failure. You may have to breakdown and go for a generator. Or go the old fashioned way and use hand saws. Good luck.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.