This  would allow me to pay down an additional $40,000 of debt, leaving more funds from the cash out refi for rehabbing a non-income-producing garden unit in another building that I have sitting there.

The only lies you are allowed to tell in a budget are those that are too expensive.

Most likely no tax difference, unless the annual interest amount approaches your standard deduction of $12k ish.All being relatively equal, I'd take the path of fastest removal of her from title.   

land per acre price info is not as useful - I'm interested in land price per buildable unit - any suggestions appreciated. Thanks!

No bank or lender allows for credit cards as a down payment.2. 

BUT... the buyer turns out to be a slumlord who is allowing the property to deteriorate so bad that the house will soon be unlivable? 

I'd cross advertise on both platforms (if allowed) and have them as additional 'arrows in the quiver' in differentiating your property from others. 

It's a real estate investment strategy that allows investors to build a portfolio of rental properties over time by recycling the capital invested in one property into multiple deals.

I had received a small windfall that allowed me to purchase the property.

The cost to own a home plummets to allow the middle class to own a home.