In judicial states in which the foreclosure process often takes a year or more, this not only generates income, this also typically mitigates property deterioration, vandalism, and other costly issues which diminish the value of abandoned properties which remain vacant for extended periods.

So spending 200k on an ADU will likely not increase your property value by 200k. 

• The “Tour Guide” makes the opposite mistake: they spend all their time pointing out flaws and justifying a low offer.

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

Spend time where sellers and brokers gather.

I'd look for a good brand and spend some time looking at reviews from a big box store. 

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

There are certain things that require experience that DIYers just can't get right or spend way too much time trying to do.

I spend less than an hour a month dealing with them. 

I mean, obvious right, people can only spend what they have.