Quote from @Matt Sharp: I'm exploring different options for building on vacant land here in CA and am very intrigued by pre-fab home designs (Walls etc.. are assembled in a factory and shipped to site).

Any pain points in investing there? 

Also, depending on the area, codes and historic have been a big pain especially since the new city administration has put a much higher % inspection requirements for "cosmetic rehabs".I've been able to turn majority of the units in the last 3 years. 

These are people who feel pain in you know where when they see wholesaler walking off with $10K is assigning fee.

Stay sharp, assess your risks, and always think beyond the “perfect” exit strategy.

Due to the sharp spike in interest rates, buyer activity has declined.

Quote from @Brock Mogensen: Those that didn't put the right debt on their properties and are bad asset managers will see some pain.

I totally understand your pain, I have seen since my youth how top tier criminals and crooks ruin the lives of decent people. 

The pain of the root canal depends on the dentist.

While you’ll face a fair share of rejections, patience, and persistence can lead to excellent off-market opportunities.Search for “For Sale By Owner” yard signsKeep a sharp eye out when you’re driving through your target neighborhoods.