Family group with one eviction

[Dave Chow]

We are having a duplex to rent received an application group.

I would like to know if we should accept this application group.

Husband: credit score 650, income $5000/MO, 

Wife: credit score 600, income $3800/MO,

Husband's Mom: credit score 570, income 0(retired). But has ONE eviction history. 

Son: 12 years old. 

All of them have criminal -free background. 

One big concern is that the Mom had an eviction about 9 years ago.

Should we accept this?