Long term $ can range from 6's-10% range depending on all types of factors - LTV, location, unit count, debt coverage, borrower strength, full doc or lite doc programs, etc..

Since then I have located the area where they entered and sealed it off, however I'm having trouble killing the ones currently living in the attic.

Are you located in DFW area?    

Locate sewer, old septic tanks,  and water lines.  4.  

I've found many properties with title issues wind up with unpaid property taxes so checking on delinquent taxes, tax deed sales and lands available for taxes might help you identify some.

None of these communities will be changing to residential neighborhoods, although a couple do have residential 'sides' that full time residents live in and can not be rented short term.Two of the big communities that you will have some issues with self managing are Reunion and Margaritaville.

@Derick JenningsRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Both told me the apartment floods so bad amongst other issues.

WHat are these locations?

Quote from @Kornelius Friske: We have a STR located in peoria AZ. it's 6 beds (garage conversion) and about 3900 sq ft in total. our energy bill last month was $450 and has been hovering in the $350-$450 range since we went live in august.