The buyer made it clear she wanted to refinance it in a year once she improved some credit and could acquire an FHA, which I was fine with.

Does anyone have a way of tracking all your expenses and income.

Some landlords realize this puts extra money in their pocket and are fine with it.However, once a tenant has not paid the rent by mid month, it's hard for them to get back on track because the next month's rent will soon be due as well.

Most large syndicators/sponsors are now using online portals for investors to track their investment.

And finally, make certain you hire a good inspector - you can try to get credits from the seller (based on repairs the inspector finds) plus it's essential to know what you're getting yourself into, property and repair-wise.

How low of a credit score should I accept?

I may never see a dime but at least it sits on their credit and possibly stops them from damaging someone else in the future or keeps them from qualifying for a car loan, home loan, etc.I hope you've learned the following:1.

Pull out line of credits on them? 

Fantastic to see how well you have been able to do over there, a credit to you. 

Tracking down the owner can be difficult, your agent can find their name and tax address, but they may not respond top a letter.