I started with an Airbnb, added several more, I am completing my second BRRRR and have successfully flipped 2 houses this year in Austin, TX where I live.

Hi BP -- I'm currently working on my first House Hack.

Built a great business flipping and selling houses. 

Now they are screwed - every time they fill out an application, for their next rental, to buy anything on credit (like a car) or buying a house...this Judgement will pop up and they will be denied.

I'd also find a real estate agent who knows the house hacking strategy or has house hacked themselves if you plan on using an agent. 

Do I have to sell the house before I get another one?

Repairs are a nuisance,  but an expected part of all housing.

Assuming the area is on the up and up Lake Property will always trend in the right direction because of the limited supply around the lake.I am in Chicago, but my father bought a lake house sw of Louisville and I think it's at least doubled in value.With your background as an electrician this sounds like a no brainer!

I also house hack and rent a room as a MTR and I've gone with high quality items to ensure durability.

Investigate government programs such as HUD, USDA, and FHA loans, select investment techniques such as house hacking, turnkey homes, or purchase and hold, and assess properties using tools such as Grants.gov, HUD.gov, and BiggerPockets.Good luck!