The government should condemn the building until it is safe, of course.

Property owners will naturally balk at steep repair bills. Regulations exist to ensure that essential repairs happen in spite of that reluctance.

Auto manufacturers manage this quite well. Some more than others, but if you bought something like a Honda or a Toyota back in the '80s or '90s, you can still find affordable OEM parts for it today, and the manufacturer will still service things like electronics clusters.

Why not expect something similar from a much simpler and less dangerous $1-10k appliance?

Soil is complicated. The bugs which live in it, more so.

If you can figure it out well enough to (for example) cheaply grow truffles in a backyard greenhouse, you could make a mint.