I built one of those in the link above from PVC and it worked great. It would only pull in ONE sat in the backwards position with a dual LNB dish. (without moving the position of the dish)
When I used a dual LNB dish, I simply screwed it to a square piece of plywood, and bolted it down. I used my Equal-i-zer bars to hold weight on it. Simply set it on the ground, and leveled by putting a stone or something under it when needed. No fancy mount is really needed if you have room to store it like this. If you need to take it apart to travel...simply replace the nuts on the dish with wingnuts so you can loosen them without tools...very slick.
Pete (Jolly Mon)
2014 Jayco Whitehawk 24 RBS
2004 Nissan Titan LE, 4x4