The simple answer…you don’t move the soil. Anything heavy will be expensive to move, and you’ll want to leave it behind. I understand that it can be expensive to amend and rework bad soil, and you’ll want to take that investment with you to the new house. The price point to move it will be the same as just getting new soil for the new home. By leaving it, your old garden and plants and the new owners can continue to enjoy it. You also want to avoid moving all the soil wildlife and letting them continue to do their own thing. Instead, focus on bringing any of your already bagged soil, unused soil mixes, ready-to-go compost, and worm castings to kick off the new garden.