I recycle my soil. I basically have a few big tubs where all the used soil goes, which is sundried whenever we get a few minutes of sun. As it is drying I pull out any roots, wire, and ther stuff that ends up in the po over the season. That I sift with a coars seeve and reuse in spring, typically I mix in a bit more bark as this falls apart during the 6 months of non-growing season. So normaly I have a number of boxes of cleaned dried substrate laying about for repotting.
I do not use acadama though, but ground baked clay as core component (artificial lava) which does not break down at all.
I reuse my soil, too.
Sift first to discard decomposed organic component.
Haven't yet properly solarize my soil in order to sanitize it but I want to do so shortly.
Further note : almost all my trees are in varying development stage.