You are off base Coaster. Those of us with CC's know what the OP is talking about.
To the OP. First thing I would do is check out the front ride height valve as those will fail and give the symptoms you describe. A new valve is in the 50 bux range. The control box is no where near $4K. I had mine replaced and the cost was in the 600 bux range. If you do need one, contact HWH as they might have a rebuilt unit.
Pumper, you did exactly right in the way you got the coach to ride height. It becomes a little more dicey if you have to do that with the rear as you have to deal with the driveline angle. When you get the coach fixed, take some measurements on all four corners while the coach is at ride height so that, if you have to, you can replicate the height. I measured from the top of the wheel well to the ground, just make sure you are on a level surface
I checked your profile to see what year your coach is but it wasn't listed and by the way, you misspelled "Intrigue"