Yes that would be my ultimate set up if funds were no object. Most (not all) used 6x6’s are beaten to death. New ones are $140,000 with dumping platform, which at less than double the price, seems like a bargain compared to a small $80k diesel pickup.
A tilting 24’ (7.5-8 meters) allowing hauling of my big square bales locally. With a bulkhead mounted winch, it could pull an empty V-box spreader up onto it for spreading compost or lime, then drive across fields without getting stuck.
I am an “over the road“ (OTR) farmer, farming more like Europeans where and fast mobility to and from different parcels means more productivity and profits.
Yields from timely fertilizing pays better, but sometimes you have to invest heavily up front to pay off the investment.
Its a process.
The truck below in a 6x6 configuration and longer V box would be my goal, but semi-permanent on a flatbed, so it can be removed to haul hay. However, I think that V box can only spread pelletized material, not compost. That truck is $30,000.
Another option is a rollback type bed???? Now we are really spending some $$