You can do it, but they do have their drawbacks. I would suggest installing a viewing window and drilling a couple mid size holes somewhere in it to keep it from being air tight.
For heating, my incubator just uses 3 15 watt bulbs and a helix t-stat. It could actually just run off of one of those bulbs, but the others are good backup in case one blows out. Its best to use the smallest heating device you can for the job, that way when your t-stat breaks down you incubator cannot get super hot and possibly catch fire.
heres a picture of mine. The viewing window has two thick piece of installed in it.
