I agree with abrightwell that you will have enough fiberglass cloth if you follow the recommended process in the manual.
as for temperature–I started my build last spring and I heated my workshop to 65. I discovered that at that temp the resin and hardener don’t flow too well from the pumps on the bottles, so overnight I kept the bottles in the house. if you can’t do that (maybe your workshop is remote) then you could fill a small rubbermaid tub with warm water and warm the bottles up that way.