People with pets have a harder time finding a place to live - survey your area on Craigslist and count percent of places that have no pet policy.Point being, it's a ripe market to target with a few safeguards (suggested above) put in place.

I would survey other pet fees in your area.

I can run credit/background through my apartment association membership. 

I know there is an annual membership fee if you want certain benefits and by joining you'll become part of the NREI. 

He might be reporting a higher rent amount as part of a rent survey to artificially inflate market rents in order to get a higher rent from another section 8 tenant.  

Do your own market survey, drive the property and neighborhood.  

How is your membership interest in an LLC (ie your building) protected If sued personally?    

They do that in the forums through the memberships and by giving access to lots and lots of people who are interested in RE to people who make their living off of people who are interested in RE: agents, wholesalers, turnkey, syndicators and the like, all who will pay lots of $$ to get their product in front of eyeballs.

The P.I.G. membership fee 10K.

I am going to keep a separate business checking account for these activites and will use it strictly to get gas to drive to property, deposit rents, pay mortgage, drive around for properties, reia memberships, repairs, etc.