I buy my gel coat in five gallon containers
takes but a few cups of product per hull soooo...
you will get a certificate telling you the layup schedule as well as the batch numbers of the gel coats if you ever need to repair any bumps or scratches (or outright demolision if you get into the war boating crowd, pretty sure this one will be the winner when the dust settles) later on down the road.
Burns about a gallon a day at cruise
Be careful what you put up forward, that fine entry doesn't like a lot of weight. Keep it simple, a v-berth and hanging locker should be about all you want up there. Four inches of sound down is excessive, I'd just buy some ear plugs.
My friend's father used to be a finish carpenter for Hinckley. He made her a planter shaped like a DE boat. I always thought he'd be on to something if he advertised in Maine Home & Harbors. I bet somebody would have some success if they'd try something like that in Fiberglass.