Something like this?? 6x4 with cross locks, 26 ton, change out the tipper body, even has live drive PTO for your hydraulic rams.
Or too close to the ground??
https://www.keithandrews.co.nz/merce...z/stock/590365
Attachment 163089
Snorkel in Palmerston North do auto leveling systems for their All Terrain access equipment, They maybe able to help with that side of it, just need to add larger rams and the engineering to take the truck weight without damaging the chassis.
Also a number of the Motor home builders do hydraulic self leveling systems, we have plumbed a few when the supplied kits don't fit..
Easy for us to comment but I think this is the sort of thing needs to end up with a specialist Transport Engineering operation
Z