This one actually looks pretty simple, and if it works properly, then it should be an asset in any home studio. I’d use a white umbrella, and spray it silver or gold on the inside though. This is one I’d probably try first.
Okay, so this one is more complicated than the others, but the end result looks really professional. I think it’s worth a shot, especially if you’re into portrait photography. It will be an asset in any studio setup.
Second great project I found: a Soft-Box that is totally portable, but doesn’t look amateurish.
This one will take longer than the light tent, but I think for studio-type shooting, it will be well worth it!