What to do with inexperienced (young) applicants

[Galen Bricker]

I have three applicants (wanting to live together) for my single family home that are very inexperienced. They moved away from their parents last year to move to another state and are moving back to this area (home). They have new jobs at very good employers and make well beyond three times the rent. They have 500-600 credit scores due to lack of credit as opposed to bad credit. Their only landlord from when they moved away says they are great and wishes they would move back so he could rent to them again. Says they take very good care of the property. Here are my questions:

1. Two of them are a couple and have been together for only a year. How should I handle it if they break up and one leaves. I know that they are all still responsible for the rent but specifically what do I do? I've never had a situation like this to handle before.

2. Should the low credit score and lack of previous landlord references concern me? The one they had made them sound ideal so I don't think it should be an issue but curious of your thoughts. BTW, I used a tip I learned here: when I called him I said I wanted to speak to him about his rental property on "x" street. I could tell he was legit!

Thanks for you help!