@Henry Clark is an expert on Storage development maybe he could give some pointers.

Markets generally slow during the fall/winter season.

Sell the home- I would keep the home vacant and wait until spring season to sell.

Unless you are a seasoned real estate investor with professional title searching skills, I wouldn't do this.

Whether you're a seasoned investor or just getting started, I look forward to learning from and collaborating with you all.Let’s connect and grow together!

A couple options… 1) Coast as is until March for better selling season, more buyers, higher price. 2) Raise the rent at least half way to market.

If you are paying no rent in your parents beach house that could bring in a lot more to your family being rented as a beach house during the season. 

At some point the House wins.To put it in Self storage terms, very similar to my C market comment above.

Maybe something unconventional like storage units or mobile home parks?

And then do it again.It is actually possible to have a super experienced General Contractor, a very deep pockets money partner, and still lose money on a flip.The most common reason, in my experience, is having a project run over schedule and placing the property on the market during the off-season.