I think your expectations are too high. There is no foundation under your RV. You have a frame setting on 4 wheels with jacks in the 4 corners to firm it up a bit. It is never going to stop moving and twitching as you walk across the floor. You can spend lots of money making incremental improvements, or you can accept that it a temporary shelter with a bathroom. It's your money. By your own observation you see that everybody has about the same thing, what do you think they are doing - accepting?