If rental income is $2100 and the monthly payment is $1700 that only leaves $400/mo to account for vacancy, maintenance, cap ex, property management (even if you don't plan to use, should always account for this) etc.  

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Fifth, she allowed a maintenance issue to go unreported that cost you a lot more money and I would have charged her for those repairs.

Do you upcharge on maintenance?

I am usually using 4-7% on cap expenditures and repairs and maintenance, each.

What is the condition of the property -- do you need to set aside funds for deferred maintenance? 

Value add potential due to below market rents, high vacancy, and deferred maintenance.

It's a lose-lose.Does your monthly loss calc in PITI and maintenance/repairs?

Hopefully after he gets out of prison, he has to serve another 10 years as a property maintenance tech.

During the initial walk-through, it was pretty obvious that it needed some work - our REA told us it was an investment property that just wasn't getting the regular maintenance that it needed.