That's a big one, I'm sure. Homes are already illiquid assets. Why on earth would a homeowner choose to add something that would make it even less liquid/valuab

That's a big one, I'm sure. Homes are already illiquid assets. Why on earth would a homeowner choose to add something that would make it even less liquid/valuable? If I were looking to buy a home, then a home with a tenant-occupied ADU is less desirable than an otherwise identical home without the ADU. The hassle and risk outweighs the rental cash flow.