14.5 feet for the boat = 30 feet of glass and that is cutting it short so I would say 33 feet if not more. 11 yards if you get the glass that will form over the sides in the process. The 52 inch does a good job and that leaves some left over trimmings for patch work. That is figuring you might want to glass the whole boat , if not then about 4 yards of glass for just the outside.
The sides do require more then a person thinks of , best way to say it is to think of the boat as a flat piece of wood and you want to cover all of it or encapsulate it in glass for it's protection.
If you don't glass the inside then epoxy saturate it and use some of the left over glass to do the area where you will be sitting and your feet are , usually between the center rib to the front rib , the glass will help on the wear and tear of you getting in and out of it with dirty feet. You will not have the extra protection and reinforcement in the bottom if it is not all glassed. Run up on a stump and there is nothing on the inside of the wood to help it resist breaking except for the epoxy saturation. The sides on the inside could be left without glass if you want to. I would suggest glassing the bottom , both sides.
The main cost in making a wood boat is the epoxy and the glass but that is what makes them last.
Just tossing up some ideas so you can make a decision , it is your boat , not mine.
Chuck.