Hi and welcome, Quirk!
I highly suggest you call Royal Star Equestrian on the east side of Tucson. This is a two million dollar, 100% STATE-OF-THE-ART facility, with stable owner living on site, everything you could ever want from a stable, not to mention full service feed/turn out, mucking, etc...
The place is so clean you literally never SEE A FLY. The environment is totally "drama-free", so there are no nasty, in you're face people to contend with, however there are MANY KIND, KNOWLEDGEABLE BOARDERS (quite a few Grand Prix/ex-Olympic riders and horses board here!!) & no one has an attitude! If that sort of behavior occurs, boarders are asked to find other accommodations.
Anyhow, look up Royal Star Equestrian in Tucson. The phone # us listed as well as a number of photos...and don't be off-put by the boarding prices listed online. I believe she charges somewhere in the area of $250/month (again, this is a FULL SERVICE PROFESSIONAL LEVEL STABLE, so you cannot find a safer, more all-encompassing facility for NEAR THAT PRICE! (A place right next door which is less nice and has less to offer charges $700/month!! And they have no trails under their land ownership, so trail riding there is iffy! Not to mention the people there are some of THE MOST UPTIGHT A##-HOLES YOU'LL EVER HAVE THE DISPLEASURE OF MEETING!
Things in Tucson are weird and not like anywhere else I've lived. You either get dirt or gold, and very often there is no in between. Crappy analogy but I hope you get my point!
Seriously though, call Royal Star. You will not be sorry...and even if it doesn't fit your needs, the BO WILL help guide you to the best possible place she can think of. She us beyond helpful!
Best of luck! Let us know what you find!
"I'm too busy working on my own grass to notice if yours is greener"