How does one maximize on allowing pets?

[Travis W Condon]

A long time tenant is moving out and we just posted the home will be available for rent. The first family that responded is asking about allowing a cat. I realize most people will say they wouldn't allow pets. However my question is how does one maximize pet allowances? Add on an additional $50-100 per month? A one time pet deposit seems like it possibly can't cover the cost of damage a dog/cat is capable of doing. I've been investing for almost 3 years and haven't had to deal with pet issues. 

Thank You!