If you want anything to go towards paying the balance down, you have to pay extra.But really this is a sufficiently basic question that you should be asking your lender. :)

From there, let the net income build until you have sufficient cash flow to buy another property, or sell them all to buy a small multi-family or something else.But you just have to run the numbers based on what your current properties are renting for, what your payments are, etc., and what you think you can buy additional property for. 

Upon further though I decided to wait to increase rents until I had improved the property more sufficiently.

The truth is, you can list this with a $50k price drop and then have a flood of buyers (assuming the buyers pool is sufficient in that area) bidding it up to where it should sell at.

Except as provided in Section 9-206 of this Act, in all cases of tenancy from year to year, 60 days' notice, in writing, shall be sufficient to terminate the tenancy at the end of the year. 

@Chris Sukala If this is a foreclosure auction with the county you will be receiving a Certificate of Title which should be sufficient to prove you are the new owners.

However, notice to your attorney, real estate agent, accountant or similar persons acting as your agent is not sufficient.""

And although lenders are stricter with verification of self employment income, showing two years of tax returns with sufficient income does qualify.Theoretically, passive income, rental income, dividends, interest income, etc. should enable you to qualify the same as self employment, i.e. as long as you can show 2 years sufficient income on tax returns. 

But I met thousands of folks from all walks of life and I'll bet less than 20% were totally self sufficient on passive income. 

I probably didn't expand my search enough geographically (limited myself to properties within a 30-minute commute of the Irvine Business Complex where I worked at the time), but I couldn't find anything that would meet the FHA self-sufficiency rule.Fast forward to 2015, and I eventually found a 4-unit to house hack using FHA, all the way up in Santa Clarita.