Thanks for all the replies.
The MH I'm looking at is a 43' Beaver Marquis and, from what I understand, uses a unit built by SCM or something like that. Anyway it's the same unit used by earlier Newall and can be serviced by Newall dealers.
I've also been told that rebuilt units are readily available for moderate cost but labor to R&R is a bit high. On the upside, AC units are pretty reliable so figure 10 years or so between issues.
Yes, it does lose one bay that is in the slide but still lot's of bay storage available so that isn't to troublesome.
I will apologize in advance for any inconvenience to my potential neighbors but.......
Again, thanks for you comments.