$31k after tax annual income - $11k rent = $20k or $1,600 per month net income left to cover all other expenses (utilities, cars, insurance, groceries, kids, activities, etc.).Median household income for 38128 is $41k or $36k after tax

We know that investing in real estate means building a business that incorporates the right investment strategy, tax & legal plan, financing, retirement planning, insurance & estate planning. 

The biggest differences between residential and commercial:  Scalability, financing are very different, property taxes may be different, Insurance is definitely different. 

Even in the nice locations, most top out around $2,800.Of course there is also your increased insurance, vacancy, repairs, CapEx, and the never mentioned reduced rent on the main house since having a stranger living in your backyard usually isn't appealing to most renters. 

Also, we'll need to know what your other expenses will be (taxes, insurance, etc.). 

If you have high holding costs (financing, taxes, insurance, utilities, etc.) the longer you are holding the less money that you are makingSelling profitably - How long will it take to sell?

I hope you or someone is at least keeping an eye on your properties for break ins, squatters, roof leaks, temperature control, frozen pipes (if in cold climate), if you have a basement and sump pump goes out leading to water damage etc.I just talked to two investors in California that have let their properties sit vacant (no mortgages so paying property taxes and insurance).

Deposits from the tenant.Security deposits from the tenant in residential dwelling units shall be deposited in a trust account with a licensed and federally insured depository institution lawfully doing business in this State or the landlord may, at his option, furnish a bond from an insurance company licensed to do business in North Carolina.

We have not disabled ours or converted to gas, but Tenant must sign a Fireplace Addendum stating if they use it, we require a higher renter's liability policy with us as additional insured, rules on wood, storage, use, safety, they pay for yearly professional cleaning each year they are there, etc.  

The reality is that insurance will cover your 16-year-old's accident.