I know people who did this. They were a nice well-behaved family, though a bit clueless about some things. Converting to add an apartment exposed them to stuff

I know people who did this. They were a nice well-behaved family, though a bit clueless about some things. Converting to add an apartment exposed them to stuff that hadn't really been a part of their world, like prostitution and drugs. Yep, renters ran that out of the apartment. The downsides are real. If you dislike having police raid your house in the middle of the night, this isn't for you.