Seller financing Down Payment of 20 Unit Apartment Building

[Victor Peng]

I came across a 20 unit apt in Houston, TX. The owner has a mortgage on it that is not assumable.

Is there a way to purchase the LLC that holds the building/mortgage or will that still trigger a due on sale clause? Or would I need to request to loan docs to confirm this?

The property is ~75% occupied, so it wouldn't qualify for agency programs.

The seller is extremely motivated and may even consider seller financing her equity. Are there any lending programs that allow for seller financing of the down payment in 2nd position? 

This would be my first real apartment building, I only own a 4 unit. If I had to come up with the down payment, closing costs, etc. it would be tight, and I worry that I wouldn't have enough working capital.

Thank you for your help!