Once I did this to each of my accounts I rarely ever let it drop below the minimum balance, keeping more of my money in my account by avoiding fees.  

If you sold you may have to drop your price more than you might want to.

Home prices have dropped since last year and are still going down.

There is a 1031 exchange called a "swap & drop" exchange that operates similarly to Jon's second example just flipping the timeline.

Please drop your questions or comments below.

I'll drop a link to schedule a call down below if you would like to discuss the HELOC situation further, as I am a licensed loan officer. https://calendly.com/tycoutts

Then you could refi if rates drop and keep good long term debt and keep your DTI manageable for future investments A cash out refinance on the Charlotte property would probably be the way I would lean if I were you if you have enough equity.

After trying to sell it for several years with four different realtors, I posted it on craigslist, where I continued to drop the price every few months. 

The whole financial freedom through real estate movement/model has been created on the back of artificially low interest rates following the Global Financial Crisis and that model won't work anymore for most unless interest rates or real estate prices in the US drop dramatically and most economists think they won't and for good reason.

If your PM were on the ball, they would have recommended dropping the price after 30 days and found you a tenant to stop the bleeding.