From what I read, OP considered using his H3 & Joeys, three Wallys, a Hopper Duo, and two H3s.
From my experience with a Hopper 3 in an RV, I would not suggest hanging a DPH42 from a tripod (nor mounting it flat on an RV roof for a Travler install). After working with a DPH42 for over a year in...