It is also why virtually every economist states rent is undesired; economist understand the impacts of rent control.  

@Calvin Graves So I disagree with the concept that the lease covers all bad/undesirable behavior that would cause a "normal" landlord to non-renew.

There are only three reasons a property won't rent quickly:1) There is something undesirable with the property.

I think the #1 most ridiculous poster is the person living in a desirable, high-appreciation location who has plenty of capital to deploy who asks which crappy undesirable market thousands of miles from where they live is the best place to buy their first investment property.

For example, I have bought a property in an undesirable area, and noticed that the rent and value hasn't changed much.

I typically get rid of undesired tenants by raising their rent above market rent.  

When I hear "affordable" I always think, undesirable since price is always based on supply and demand.

Look at SF  Portland and Seattle.. big movement back to the burbs because of companies leaving. now they are leaving because of defund the police and homeless and other social issues have made living there undesirable to many..

The property is extremely mismanaged and the tenants are quite undesirable. 20 of the units are affordable housing tenants and 5 of them are on a master lease with this company who lets the homeless community use the units.

I have an area in mind that is currently undesirable but based on market trends seems to be primed for growth in the next 5 years.Any advice on research I could conduct before diving in, or other avenues I could explore to start and build my portfolio would be greatly appreciated.