I don't want to create a new thread as I have a similar predicament to this and believe I have solved it.
Like the bus in the picture, Inner Love is parked on a minor slope (8-10 inches height difference between front and rear tires) with one side on dirt and the other on driveway. I want and need to get the weight off the tires, all of which haven't moved for close to two years now. There is already hairline spider web cracking on what appears to the outermost ply of the rear tires resting on the driveway. The side on dirt does not have this as the tires are sunk in some, thus spreading the load across more of the tread.
The driveway edge is just beyond the frame rails, and is already cracked up (mainly because my mother didn't want to wait 30 days before driving vehicles on it), so I can have hard support for all jack stands on the concrete driveway. After reading some threads on other forums, I've decided I will make cribbing out of plywood as I don't have access to railroad ties and I want this to last for life.
Since the slope is less than a few degrees, and I can get away with making a few more cracks in the driveway, I am looking to use self leveling driveway epoxy to flatten the spots I need to put the jack stands on, as 1x1 half inch A36 steel plate costs $57 at MetalsDepot.com (I didn't check the shipping cost, but I can't afford to do it this way). While I could get away with using jack stands on what many people would consider a slight slope, I would not feel good about this.
When I can, I will be buying 4-6 of these jack stands, found at
https://www.amazon.com/BIG-RED-ATZ12...dp/B09ZNTWYZG/
, and buying a 20 ton pneumatic driven jack like this one, found at
https://www.harborfreight.com/20-ton...ack-59426.html
- to take the weight off my bus tires and level my bus for the rest of the interior build.