An inflatable screen is a good place to start, easy up, easy down. You should be able to find a 12ft diagonal screen for around $200. As for a projector, there are a ton of choices. My wife and are are fans of the "all in one" units - dvd player and projector in one unit. It makes it very easy for her to set up on "girl's night" (my screen is a permanent installation). You can find these on craigslist, but if you are looking for some thing that you can be "sure of", Epson sells refurbished units with a new bulb and a 2 year warranty on their website. The MovieMate 60 is a good, solid unit and it sells for $349.00 (refurbished) with free 2nd day shipping. If you want separate pieces, they have a number of refurbished projectors starting at $149 and going up. You can find dvd players anywhere for $30 -$40, and blu rays for under $100. No matter what you use, you will need some type of sound system. An old stereo receiver and a couple of speakers can be found for under $100. That is the basics of what you need. From there, you are only limited by your imagination (and in my case, budget). I started with an old Radio Shack Cinego projector shooting on a block wall. It wasn't great, but it was fun. The projector was replaced by a MovieMate 60 for the brighter picture and the block wall was replaced by a permanent black out cloth screen. Keep an eye open for when Backyardtheater.com is up and running again. There is a wealth of information there and the people are more than willing to help. Good luck, have fun!