That would mean entire metro areas would become ghost towns and entire new metro areas would have to be built.

I could say a particular town or area, but if there aren't any, many properties for sale that doesn't help. 

Just north of town 10 blocks they built about 100 mini houses about 300 square feet.  

Working with the city to find a solution.There is a similar situation near me where an investor bought a short term rental house, rehabbed it, ran it for a while, and then got in trouble with the town after a neighbor complained and the town said short term rentals weren't allowed in the community. 

Why would they move, its built to their design?

House was built in 1920 and renovated by the seller. 

There are 4 Single Family Homes built on the site. 2 are built-to-sell and 2 are built-to-rent.What made you interested in investing in this type of deal?

Quote from @Gaetano Citera: I would look at what has sold for Prefab verse stick built..

When that area was built, people flocked to it for it's affordability, but over the course of several years, it became like a ghost town. 

Its already too many opportunities to fail if you are in the same town, on top of it daily.