I once bought a house that needed rehab, including all new central air, and I installed an alarm system inside and a steel cage on the new outdoor air unit.

All Airforce One service is done there along with fighter jets that can be in the air quickly.Most of the "Shore" (beach towns besides AC) are expensive second home markets

Depending on the location you may even be able to air bnb one or more of the units which could potentially produce higher income and less tenant issues.

Air bnb isn’t going to much better with strangers coming and going in your home .

:Ideas so good, they have to be mandatory ;) There's a few of those like clean air acts, clean water acts, DUI laws, health and safety laws...... :)

Facts: Owner listed property at an $85,000 was purchased in 2018 for 41,000 and rehabbed(some) mostly flooring paint and heating and air.  

I would suggest Universal heating and air co.  

Thats why most air BNBs in RSOs have a 21 day limit.

I'm coming off a year and a half of doing renovations to my house myself, with help (from bathroom to kitchen, air ducts to installing windows, tiling to plumbing and electrical).

Plus, development of new attractions underway offers several promising opportunities that remain largely untapped so far.Specifically you should consider Air B n B guest income which could be as much as $200 per night with the right amenities and location.