My soil and situation is similar to yours, J. Hampshire. I remember in one of Pauls podcast where he said tilling would lose 30% of the microorganisms,but 30% of almost nothing is not bad. I took that as an ok for me because I live in a desert and my soil didn't even have weeds. It doesn't matter to me,renting my home and putting all this energy and money, to make a permie backyard. The way I justified it was thinking of repairing the land by restoring the soil, go somewhere else and do it again, plus I get experience before I buy my land. Now, I have a tree