The Holiday Rambler is very much like my 2000 HR Endeavor except for length. It's a good coach.
Possible problems: That dash is all one piece. If one instrument fails you can't just replace the one instrument. Some folks rig a separate instrument or look for a used panel.
If you get it, weigh the coach on all four corners and calculate tire pressure. You may find the left front tire in an overloaded condition for that size tire. My coach's previous owner had multiple blowouts on left front. I found left front heavier than right front, and the left front tire was overloaded.
Overall, the HR may be the best pick of the bunch you're considering.
Fred & Vicki
Richmond Hill, Ga
2000 H.R.Endeavor/Freightliner/330 Cat