Yeah I would consider making your own! So much cheaper and you can make fun props and stuff really cheap and easy. Just google DIY photobooth props and youo should come up with lots of ideas. You can also get fun props at used stores - straw hats, funky ties, etc.
I'm making my own. I have already painted a few backdrops. I have bought/made a ton of props. FH made a great PVC stand for the backdrops. We will set up a camera with a timer for folks to take pics. Total cost? Hmmm...maybe $100 tops.
My photographer has a package that includes a $400 photobooth. She sets up a station with a little hand-help remote for guests to use. It's not a traditional "booth," but I've seen some she's done and they were great! She also brings all the props and gives me a disc of the pictures.
We're having a photobooth at our wedding but its kinda the "open air" type. Red carpet, poles & ropes, tons of props,wide selection of backdrops. I got mine for about $500-600. but they only have 4x6 prints. here's a sample product I saw at their site and the other one is a picture of their setup. they also offer duplicate prints for extra charge in case everyone in the group wants a copy of their own.
I also got a deal through Living Social or Groupon. You have plenty of time to sign up and look for the deals. I just did mine about a month ago, so it looks like that have them pretty frequently. I paid $299 for 4 hours.
Ours is $800 for 5 hours with props, a memory book for guest to put a copy of their pictures and write a comment for us, a CD with all the pictures, an attended, and the travel fee since they have to drive an hour and a half each way.