By service do you mean LOF or some other services? I use Holmes tuttle ford for our service and they are pretty good. I think an oil change is in the $70 range cant remember. I know they cannot do alignments but have a shop to recommend.
It has been a couple of years but had a good experience with "All RV" on Grant. They chased down an electrical short in my TT and installed a new awning. Good work at a fair price.
Try Freedom RV at 3735 East Irvington Rd Talk to Nestor Diaz in Sales and tell him Fox from Puerto Vallarta sent you. They have always been very good with me. 520-591-8660 or 520-750-0100 Good Luck!