Get a set of six custom valves with air-through caps from
Tire-Man and be done with tire checking and airing problems! I happen to have a different set from
Borg but the price advantage we used to enjoy has mostly gone away, and the Tire-Man set is more comprehensive.
With those solid brass custom valves and air-through caps, I can check all six in just a couple minutes. But Wait! There's More! The valves are so well made that the tires just don't need air all that often. I haven't added air since New Year's Day.
I like the idea of TPMS, but I don't think they'll warn you in the last less-than-a-minute that it takes for a major tire injury to turn into a blowout. If I were to do TPMS I'd want it checking my TOAD as well, a Ten-Tire setup.
You've got a new coach. Make your tire valve setup right now, you'll be thankful for years.
EDIT: On a trip, so you're loaded up as for travel, visit a truck stop and weigh the rig. Four corners if you can, but at least Front Axle and Rear Axle. Then look up a
Load/Pressure Chart and set both fronts and all four rears according to the chart. If the sides aren't equal, set them for the higher load. That "sidewall 80 PSI" is for max load, and your front axle's max load translates to only 65PSI.