Short-term Ownership:The flipper's primary goal is profit, not creating a long-term, quality home.

just be cautious when it comes to using these. ensure you've got a plan to pay that balance back in a relatively quick fashion as most HELOC rates can fluctuate which could make the numbers suddenly not work. i've leveraged mine in instances where i'm doing a BRRR and i want the deposit for a private money loan. i'm not using it as my downpayment and leaving it out there for a long period of time. 

Is there a commute that's so long and arduous that people turn away from Boston and decide to work on central Maine and New Hampshire, trading off some income for quality of life?

Going over your numbers, have you considered a long term rental instead?

I want to make sure I form it correctly to avoid any headaches in the long term.

If you're trying to avoid a balloon payment - a long term DSCR would be best for you.

They also said they offer fully amortized long term loans!

I have 10 long term rentals, I am not as familiar with short term rental marketing. 

Usually refrigerated food will stay for a very long time - months, in fact - without becoming putrid, though you probably wouldn't want to eat anything out of it.

If you have them pumped every year they can last a long time.