WELL, my sister's husband owns one, but I highly doubt he would be willing to let anyone but his dad take it outsdide the house...
I would try going to an electronic store like best buy and finding a cheap projector, or seeing if they have a rental option, another option is going to a rent to own place, such as rent-a-center, and renting one for the time you need it and then returning it, if they let you.