Possible tenant

[Georgia Acres]

My newest possible ternate is a family that has lived in the wife's parents house for 6yrs. She says her parents moved to a retirement village so she moved into her childhood home and paid her parents rent to help them have extra income. 1. How do I check her history of paying on time? 2. Her husband has been on his job for 5yrs, he's a general manager of Longhorn Steakhouse but, she has changed jobs 3 times in the last 2 yrs.... 3. Her job is a property manager.... For some reason that intimidates me alittle. I'm new to renting and don't want to be the newbie on my own property! Any red flags here?