: but
: want to make sure I have enough glass and epoxy.

You certainly do ! I worked out the amount I needed from Nick's book when
I was setting up to build my first boat, then ordered enough resin for five
boats. Never regretted it, even though I've only managed to build two so
far, as I have a dozen on the drawing board. You CANNOT build just one boat.
If you imagine you can, then you should seek treatment ...

Andy