Hi,
325 gallons pots are not easy to move. They would brake from their own weight in the moving . What are they made of ? Photos ?
I'd rather go with 20 gallon pots and bury 1' of height in the dirt around the house. Be sure to water them consistently.
When the time for moving comes, dig the containers out, cut any roots that got out into the free dirt and plant them in the new location.
Perhaps, plan to make new trees from the first ones in 5 years, to keep smaller trees that are easier to move.
Question: 325 gallons, is that what they call the American way of life ? ... LOL