NACA could call the loan if they think you didn't make a necessary choice, they do not consider paying off credit cards as okay.Your HELOC lender can also close the line if your FICO goes down or they find out they are in 3rd position.NACA is an amazing product no down, no PMI, low rate, no fees - you sure don't want them to call the loan.

Do you know of a good resource where I can find price trends particularly for small multi-family?

I know a  couple of people that are doing find on their own for that kind of product.There is a Facebook group called Coachella Valley Short Term Rental Owners that I created a while back.

However, if you are going to take advantage of cost segregation, I would recommend working with a CPA that specializes in real estate such as Michael, Ashish, etc. or I'd be happy to provide additional recommendations rather than doing it yourself through turbo tax.Here's an article with additional FAQs on cost segregation studies that you may find helpful.

If you can't find what you're looking for, try the Bigger Pockets Fileplace.

Now if there is a defect in the foreclosure process, the court may set the deed aside and instruct the Clerk to return the buyers funds but if the buyer later finds that the borrower foreclosed on only had 50% of the title, to bad so sad. 

I understand it take effort to find great deals. 

You should be able to find some good options on here so long as appraisal is sufficient and DSCR min is met 

Where can I find those cities economic development sites?

It's possible to find them without prepayment penalties, but the tradeoff will generally be a higher interest rate and/or additional fees (points).