But usually for a tenant occupied it's like $90-120 per monthI've noticed a lot of multi-family buildings are pre-WWII housing inventory - are there restrictions or issues common with that (historic districts, crazy high utility costs, etc)?

I am going through the regulations and restrictions in that place (not a closed community but there are some rules).

Your best bet are still the Townships - they have the best schools in the county with the least restrictions. 

I can't remember exactly, but I believe the main ones had to do with additional parking restrictions and water.

For instance, FHA guidelines are very strict and restrictive when it comes to using departing-residence rental income to qualify for a new FHA loan (such as the 100-mile rule).

Loan FlexibilityAre there any restrictions on the types of properties you’ll finance (e.g., location, property condition)?

But the neighbors told me when they built their house from ground 6 years ago, there was no issues for any building materials or trucks going through the alley. 3. the house is in historic district of Charlotte, meaning there are quite some restrictions on the exterior renovation. 

Also, make sure there aren't additional restrictions on the property condition, compared to a conventional loan. 

Realtors often claim they're restricted to Realtor use, but that is incorrect. 

The city just passed a very confusing zoning regulation restricting student housing to a specific area, and we're all trying to figure out what the fallout will be.