So, it depends what you are looking for as an investor.

You can get a HELOC if there is equity in the property most likely, which there should be since you own it in cash, but you will just be decreasing your pay out and then may end up short in repair money, depending on how much it is worth.

Depending on how that conversation goes, post a 3 day for nonpayment. 

The violation - depending on your state - will provide a 'cure period' before eviction proceedings would begin. 

Selling would likely mean taking on new loans at much higher rates, reducing your cash flow margin unless the new properties are stellar performers.Transaction Costs and Taxes: Selling could trigger capital gains taxes (depending on exemptions) and other selling costs, eating into your net proceeds.

Depending on the salaries of the new jobs they may also price out the local residents on new home sales which would further drive up the price.

Don't depend on Aircover.Homeowners policy will not protect you if your renting as a STR.You need the correct STR policy to protect your property.

@Mohamad Guene Regarding your question, it really depends on the investor.

Obviously, a lot depends on your price range here and exactly what you're looking for. 

There are many routes to go when starting to find leads it all depends on your budget and experience.