I'm putting together what will be a portable project for my company and could use some input and advice. Our use will vary from projecting on the side of buildings, a blank billboard we've rented and our semi trailers. Yes it's all being done leagally. I want to go with DLP, I think 5000 lumens is the minium I need. I can't go with new and it doesn't have to be high definition, I think a lot of the quality will wash out, so power is my priority. I'm sure I will need either something with interchangeable lens or a zoom lens since the distance will vary from project to project. So the advice I need is opinions on the projectors I should consider. I'll run everything for the individual projects from a laptop with a dedicated video card, sound is not a consideration. It isn't about projecting a movie, but a combination of short videos with the right "screen" or possibly just a static message. I've scoured the internet and there are businesses that specialize in this so I know it's possible, I just need some guidance. Thank you all very much ahead of time. Paul