These can be huge determining factors in deciding what the best move might be moving forward.

Many lenders have a 150 mile rule.Different lenders have different rules and where they sell the loans determine the level of scrutiny each lender has. 

What you need to do is issue parking permits and make a sign , any car parked without a permit is towed .  

Contact a local tow company and see if they will put up one of their signs on your property.

They give up to 48 hours so sign the purchase agreement. 

If so, it might be to your benefit to work with her and raise it to an amount that you determine she can afford while she looks for a new place. 

For signing a contract to purchase this house, should the seller's name on the contract be only the widow? 

You can find them through MeetUp.com and NationalREIA.orgThe locals are the ones you will sell to and even buy from.And call all the local bandit signs that you see.

@Michael Garfias You should research the surrounding areas to see where the residential MFH (2-4 units) 1) are available; 2) in demand; Once you find your target market, determine how much would you need to buy it.

You won't be able to sell it to yourself, and a bank won't lend to a new LLC  unless the owner signs as personally liable anyway.