Like what @Adam Widder said check with your rep and see if there are other pricing options.

Section 8 may be an option as their vouchers are less concerned with specific locations in the city.Another point I want to bring up is your equity position.

There may be other options there.But, from a strategic angle, that is where a random guy on the internet jumps in and says "You might be able to buy the property from your mother on a Lease Option" that you make the payments and maintain the house with the option expiring on her passing date, converting back to her estate which you and any other heirs will inherit".

This means the terms and requirements of the loan will be different, so it's important to shop around and find the best option for your situation.Managing a larger building will also require more time and resources.

You can invest in real estate with as little as $25-50K if you are open to exploring other options.

Could be an option for you there in SD...

And after reading this reply (amongst numerous others)...

After the rehab/rebuild is finished what would the most lucrative option be?

Outside of that you don't have many options if a lease is active, and they haven't done anything wrong (legally). 

Of course, this won't work for everyone but I do think it's a great option!