Do you pre-screen your contractors be for you hire them?

You should never tie an option to a lease, or a lease to an option.If this is your residence,Offer a lease purchase (screen buyers)Separate lease, 12 mo term, market rent.Separate sale and purchase agreement, 3% earnest money, non refundable, with long term closing date, say 12 months.Send LP tenant buyer to mortgage banker IMMEDIATELY.Send LP tenant buyer to get assistance improving credit and FICO scores. 

Then you need a better tenant screening process.

Incase no one told you your picture is the right way on my screen.

Just screen your tenants and you won't have to worry.

You should always screen every adult (18 years and older) occupant.

What is your realtor doing to screen?  

However, keep in mind that your screening process should stay intact.

Screening your tenants is one of the most important tasks for a landlord.

I try to eventually fence my properties because it attracts more people that care about that kind of thing (and screens undesirable neighbors).