Overcommunicating this prior to the guest booking and arriving can help prevent unnecessary discounts later. 

We upgraded the bathroom and kitchen floors, put up newer cabinets in the kitchen, and replaced the washer and dryer with newer (used) ones.What was the outcome?

You'll want a Wind Mitigation inspection to see if you can get any discounts -- they can add up quickly. 

The issue with keeping it though is a relative lended the full amount of the home price at an extremely discounted interest rate (less than 1%), and I feel that the sooner I can pay them back the better.

Taking a discount of that number for OKC is fair so maybe closer to the $35-60k range @Rick Imby mentioned.

You can sell the note to anyone to create liquidity, but note buyers generally want a pretty steep discount. 3.

So they don't pay twice, but it removes any incentive to use one agent for their marketing and then hire a discount agent as agent #2.All the details for NJ should be in your contract.

If you want to do extensive rehabs like a gut remodel of a kitchen or bathroom, then you just need to make the units vacant no matter what the tenant situation is. 

Even at a discounted price. 

Either your mom is getting a good deal (basically free or discount living expenses) or it’s going to make a horrible rental as you will get worse financing, insurance and probably property taxes than she’s getting.