The water is on a well and the waste is gravity fed to a large bank of septic tanks that are periodically pumped. 

I only see demand increasing as people get fed up with hotels and realize how much more value they get from a good STR. 

I'm now at over 20 properties and 50 residential units.The concern on HELOC is that with it being tied to the prime rate, it can vary as the FED continues to raise interest rates.  

Maybe they need someone to cut the grass at a vacant property every week.

Keep in mind that the rate will be high - maybe 7% right now, and will be variable - probably OK as the FED is predicted to raise rates one more time and then slow down.

@Trevor RichardsonMy only expenses will be grass and snow removal for this property

If 2-3% inflation is the Fed Target, you don't really get ahead with bonds in my opinion.   

Here's Why:The dollar is up this year vs. major currencies at the same time the Fed is tightening.The Fed, while having raised rates marginally, is just now taking things back into positive REAL interest rate territory.We all know how tight deals are now, valuations can't support much higher interest rates.Unemployment is extremely low.

People need to be following the FED.

If you have a yard, ensure the grass is cut, plants trimmed, leaves raked, etc.