boatbuilding costs

[signum]

I have a few questions for the ones that will have the kindness to answer me :

Between plywood core - epoxy fiberglass building method and PVC core foam - polyester fiberglass building which one is cheaper ?
I refer just on the costs not on the advantages of each method in part.
But the the PVC core foam - epoxy fiberglass method ?
I know the epoxy resin is more expensive than polyester resin and the plywood is cheaper than PVC core foam at least in Europe.
Any opinion will be welcome to me.
Thank you all.

[jimslade]

plywood is cheaper. done the math many times myself
plywood $1.00 fiberglass $1.50 core $2.00