Feel free to ask any questions you may have regarding Freddie Mac and Fannie Mae multifamily financing in the comments - or DM me directly. 

Quote from @Diandre Pierce: I have 7 rentals with a total available equity of roughly 800K.

They will issue an IRS Form 1099 in January, reporting your total taxable income to you and the IRS.

For a 90-unit project, this could result in a tax credit of $180,000, and for a 112-unit project, the tax credit could total $224,000.

So, if you put in 20K, you could set the bid up to the amount of the 100K total debt(80K existing + 20K additional) to ensure that the property reverts to you as the lender.

Be sure to check out the free tools BP provides to help analyze deals you may have and also market insights.

Feel free to reach out if you have any questions.

Google the term UBIT.Tom Wheelwright has a chapter on why you don't want to do this in his book Tax Free Wealth.

Yes, I’ve got a mortgage on it now, but my cash flow went from only $1000/month to $2400/month and I picked up 3 more properties basically for free with no out of pocket cash to buy them. 

With the equity you’d free up, paying off $50k in personal debt and boosting your credit score while freeing up $3k/month sounds like it could significantly lower your stress and open doors for future projects.That said, selling means you’d lose a cash-flowing asset, even if it’s not huge.