Very confused.

I'm wanting to get out of the card board and cheap lens to make a so called big screen tv, been to that for 3 years, and only had one good tv/projector that worked great. I'm wanting to get into the overhead projector and projector panels, since its easier to move around and create. But theirs so many ideas, and panels, overheads to pick from. I dont want to crazy with this, just want to no what people have used that is good, and how much and were they got it, or even better if you would like to sell it. Would like to see pictures of the working projector if possible, since i would do a compare and pick the best materials ill need, would love to get this finished before July, for my other star wars party. Thanks, contact me plz.