If you're doing any furniture, don't use solid ply -- use cored foam composite with veneer. Don't load it up. I know you promised a microwave, but leave it home along with the generator and cabinet it requires.

The F31 is very comparable in size and weight to the Dragonfly 920 I had 5 years, and experience says if you don't listen your boat's "get up and go" will go. Resist temptation to load it like a monohull.