It really depends on how much capital you're working with.Chances are, unless you're going out of state and doing some work to force equity, you aren't cash flowing with 20-25% down.That's just not the environment we're in.If you have the capital to buy cash, do some renovation, and then do a cash out refinance, there are options out there. 

I then negotiate with the borrower a plan for repayment or I foreclose.

If you must be the on-the-spot final decision maker and are also the sort of person that can be talked out of $1200 per year without giving yourself time to think through your options or come here for advice then please hire a manager.No request, no matter how small it seems gets an instant response!!!

Another option I thought of was getting an Auto equity loan on my 2018 Ford Fusion.

One good option is being a local airbnb cohost for a property near you.

A lot of options and it depends on your goals.

He does not need my money in that he has other options. 

Most though will have a due date in the beginning of the year such that you have the option of paying it in the prior year.

Is an ADU (accessory dwelling unit) in option for your home?

By simply making the requirement to make vacant for closing alone with typical "time of the essence" language the buyer has the option to walk away if the seller hasn't met their obligation but can also hold the seller to the contract or work the deal further.