I typically ignore student loan and/or medical late payments.As long as they aren't delinquent a lot, can afford the place (with verifiable income), have good landlord reference(s) (aren't needy, paid on time, or paid late fees if they were late and didn't destroy the property) and don't have any evictions, then they're good.If the first guy qualifies, let him know, set up a date to get the lease signed and then mail the old guy his fee back since you didn't process it.

All of this comes down to math and negotiating skills.

Some people make bank on these properties and they have the time and skill to deal with lower end tenants.  

People will always say they know everything, but before I interview them I think it would be helpful to hand them a 10-20 question test to see if they know enough to be worth the time of an interview where I can focus more on personality fit and soft skills than simply technical knowledge.Does anyone have any ideas of questions?

This a valuable skill.

I also plan to use rentals to teach my son life skills, business management, and making your money work for you.  

I'll talk to community members about donating time, either skilled (plumbers, electrician) or unskilled (help with demo).  

They aren’t under a GC either, but they are experienced and skilled.

Hello everyone I am brand new to the investment world as well as Bigger Pockets.I was recently retired medically from the Marine corps and new that a fixed income wasn't going to cut it to support my family.

Keep in mind to never downgrade her opinion and you do not have to agree with it but you can understand it.Try not to control his opinions no matter how negative she may be but use your persuasion skills as an investor to share a more positive outlook!