I keep the pelts for my own use and plan to make a couple of blankets and at least 2 cat beds, as my cats love them. Pelts are worth basically nothing when "green", fresh off the rabbit. Tanned they are worth a little more, but still not worth much unless in Prime condition (tanned perfect or near perfect, no hair loss, 6+ month old rabbit, generally only Rex, Velveteens, Satin or Silver Foxes). Items made from fur are worth the most, but do require much more work, obviously. People do use Angora fiber, usually those people either have very large groups of rabbits or they also have sheep and/or alpaca. The different angora breeds all have their own unique characteristics, too.
I actually don't use water bottles at all for my rabbits. I had a lot of issues last year because I babied them so much. This year, the temp swings have sucked, but the rabbits haven't done much more than pant heavily. I just spray down the chicken yard and rabbit pen roofs during the heat of the day, along with the trees and various structures out there. The temp drops about 10 degrees every time. And I only do that when it's over 90. Other than that, they're fine. Just make sure they aren't in the sun and you won't have near as many issues. I also have an auto-water system, which keeps them in fresh water all the time and was super simple to set up.