I envy you being able to afford epoxy resin; personally I've never used it in 14 years of canoe building. Instead I use Polyester resin, which costs me £80 for 20 litres, so I guess that is around $6 per litre, which is much cheaper than epoxy.
I would not pretend that polyester is a patch on epoxy, you could show me a dozen tests in which polyester fails before epoxy. However, I have never experienced the failure of a joint when reinforced with glass fibre, and have used my canoes on the sea, on lakes and on rivers.
It is slightly quicker to "go off" than epoxy in similar temperatures, and can be slightly accelerated by using a bit more catalyst ( which I generally add at 3%).Polyester resin gives off nasty fumes and needs to be used in well ventilated conditions.
Hope this helps someone who can't afford epoxy but would love to make a stitch- and -glue canoe.
John Clohesy www.birchcanoes.com
PS I have bought some epoxy and will be trying it in my next boat.