My wife needs to get a projector for the business that she is currently starting up (training and induction programs - yawn but it pays the bills)

I was going to get a basic model but now think I should get something a bit more upmarket that I can use at home if and when required. It's not something I've ever contemplated getting so know little about them. I need:

HD
Portable
Lot's of connectivity
Is wireless an option?
Not crazily priced although it's 100% tax deductible straight up

Any ideas?