I started making something similar that would allow me to inflate a pair of tyre at the same time. I have the tubes with the coil air lines with the tubes similar to that in the photo above, a manifold, a Jamec Pem automatic tyre inflator (
https://www.jamecpem.com/collections/tyre-inflators/products/auto1000-digital-auto-inflator), I also fitted all the fittings into the air system for the connection. I tested it all out a few times and to be honest, found the difficult part was screwing the connector onto the valve, especially when the wheels are muddy or I've been on the beach. The clip on connector is much easier to use, the biggest problem is the Schrader valve on the tyre, they limit the airflow a lot. They also tend to be fairly soft brass, so it is easy to damage the threads on the valve.
I already have two sets of these Staun Automatic Tyre Deflators,
https://stauntyredeflators.com.au/ I have set each pair for 15 PSI, 20PSI, 25PSI and 30PSI. That way I can just put them onto the tyres and get back in the truck and wait till they stop deflating.
I also have an ARB tyre deflator
https://www.sevenslot.com.au/product/arb-tyre-deflator/ if I want to be more accurate, this is really quick to deflate the truck tyres, as you screw the inside of the valve out. It works great but is a bit more effort to use as you have to keep checking the gauge.
I don't find it a big deal to stop and change tyre pressure, it is not something you do every five minutes, I've found that I tend to let them down only once or twice a day when we are travelling offroad or on the beach. Taking a break means you get to think about where you are going and what the risks are - and maybe find a better way. We always take the easy road, and don't want to put our home at any risk.
I'll post some more of the details in my Camper buidl thread, to keep it all in one place.