Its something I considered doing in the past.Given a little care about securing the moving parts,it might well work.What put me off the idea is that lots of such events are held in a marquee or even an open field and it would probably be necessary to take a generator too.So there would be a need to make sure the power from that was a nice regular AC supply and the adjoining exhibitors might not be too thrilled about the noise or exhaust fumes.