Consider all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

For a cleared idea, I had 5 bedrooms l, each having a key code style lock for privacy and security.

am I legally allowed to keep her last months rent and security deposit?

Their official policy is that they will not pay more than market rent.Also @Clint Jusino mentions taking extra rent on the side. 

Separately, I use apartments.com to collect rent, security deposits, bills, etc - also free for you as the landlord and the tenant.Third - to write off items for taxes, I'd check with your CPA but in general, it would be anything you spend money on with that property, including mileage going there.Best of luck!

Leveraging Susan's local market expertise, we secured the property for $90,000.

Leveraging Seth's local market expertise, we secured the property for $270,000.

Leveraging their local market expertise, we secured the property for $220,000.

Leveraging Russell's local market expertise, we secured the property for $110,000.

Leveraging Seth's local market expertise, we secured the property for $175,000.