Well...you DID say you grow fruit trees...some people have mango trees in the 600 gallon pots.
For that much dirt, might be easier to build a giant raised bed or something. Because you’re probably NOT going to be moving that around.
We have moving day twice a year. It involves a moving dolly. Not sure what you’d move that 600 gallon one with. The 25 gallon ones move easily with the moving dolly.