I built a homebrew for about $90 from Jesses' page. No frills, ammo can, etc. I feel the same way, don't really mind losing $100 compared to what some of the good cams cost. You can get the ones for $100 now, so that wouldn't be so bad. How good does the pic have to be? If you are looking to get pics for framing, it would probably be a lot of work (although some turn out that nice), but for playing around and seeing whats running around, a $100 trailcam should work out good.

--Jim