If you have positive cash flow with the HELOC, you can wait and collect cash flow until it sells or sell at a loss and move on.

They would not do anything and just collect the check for the sale.

If the state has held a Certificate of Sale less than three years from the date of sale by the county tax collection official, the Certificate will be assigned to the purchaser.

Unless she's breaking some rules, don't do anything but collect monthly rent. 

Any best practices on collecting past due amounts?

Right now, this figure is holding steady at an impressive 97.1%.

You get one first impression so make sure he knows you want to purchase.

My initial impression is it wouldn’t be a great market to invest in.

MANY MANY scams going on to collect application fees doing exactly that.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560, little to no good tradelines, lots of collections & chargeoffs, recent evictions.