To me, when I was there, there were two important items to have, and a nice to have. Go to Lowe's or Home Depot and buy a "pancake compressor", they have a 150 psi gauge mounted, and will work to put air in tires, along with a 50' hose and a digital tire pressure gauge. The nice to have is an "infra-red" thermometer, with which to check tire temps.
Also recommend they check and make sure the "cores" are tightly installed and do not leak! {Ask me how I know}

I also took a TST-507 tire prsseure monitor system 8, 10, or 12 monitors, depending on coach, tag/no tag, and/or toad! I temporary suction cup mounted the receiver on the corner of the windshield, and needed no booster mounted at all. Still works great 6 years later.
Too me, the tires are a most critical component about a coach, as it is your contact surface, when being propelled down the road, and any potential issue that can monitored is needed, and can save, life ,limb, or injury! Not trying to be gloom & doom, just factual, as to the results of a potential failure, hat could be avoided!
CPU should be an enjoyable and fun time! Check & use each system, etc, and video, if possible when/what the "tech" is telling/showing you, and keep it as a reference! Sudies show we retain about 10% mentally, so it's nice to hav a reference!
Have FUN, and may you enjoy "MANY MILES OF SMILES"!!
