[Fulltiming]

Use the HWH buttons to let the air out of the suspension BUT in the rear, you can NOT let all the air out or the fender flares will rest on the rear outside tires and you will grove the tires with the metal fender. If that gives you enough clearance you can start the engine, the HWH will switch to ride mode. Immediately press the level button again. It should stay in level mode as you slowly pull forward or back out. It will typically switch back to ride mode if you get your speed up over about 3 - 5 miles per hour. Just watch the panel and be sure it stays in level mode. You should be able to slowly move the coach with the suspension lowered about 2-3" from normal if the ramp is smooth (don't let the coach rock side to side or the tires will get ground down).

Since you want to lengthen the building anyway, The entry side of the building could be extended and modified to move the door somewhat closer to the center and the new and existing framing modified to give you an extra 6" of clearance. The door could be modified so you would not have the extra 6" of space under it. I think 6" of extra clearance and lowering the coach about 2" will give you enough clearance to get in and out slowly.