It's amazing how polarized people are on the topic of renting out cameras. Although if there's no insurance, it's pretty risky. Not to mention if it's a friend, and the terms of renting aren't clear, you could throw away a long friendship over a few hundred bucks.
I don't want to come off as too spammy, but if you're serious about lending your gear, you should take a look at my P2P camera lending service, CameraLends. We guarantee your rental so if anything happens, we're on the hook instead of the renter. I've made >$1000 renting out my Mark II, for example.
