Frankly I would be less excited at spending any kind of money on a place that I don't own.

The data the pull in the article is a few years old but it says that Nashville is in the top 10 of the highest revenue STR cities.

On top of that, we'll see a booming economy. 

The ones that build out great companies build the skills, then they teach the skills to people to set calls for them, go to appointments for them and they continue to build out their company as a marketing/sales operation that is more fluid to create more revenue. 

I also can see on apps early on if have a dangerous breed and can put those apps in back of the pile rather then it being a surprise later on. 

It could, but you could screen this location with PriceLabs.co as they use both airbnb and hotel rates to create revenue forecasts.

Again even if you have great credit as you start to add more credit cards, mortgages, auto loans to your credit you can also be viewed as "High risk" due to Excessive trade lines in credit or higher DTI - debt to income ratios. 

having a HELOC to have an emergency line is smart since if you really need it in a crunch you could draw funds within 1-2 days or less in most cases.

If the property was already listed on the MLS, I'd push back on the price relative to the comps.

You've done a great job with keeping your debt low so I have no concerns about your level of discipline to use/reuse a line of credit.All the best!