Like someone else mentioned, doing a short term rental in a secluded basement that is very private and walled off is one thing, but sharing the same refrigerator, kitchen thermostat, etc. with a complete stranger seems like it will introduce more problems than what the money is actually worth.

You will also need wall hangings and art, not to mention kitchen stuff like silverware, pots and pans,

For instance, one property seems to have an extra bathroom that is not listed in the county records.I plan to make some modifications, including removing a closet wall to expand a bathroom and taking out a kitchen island that contains electrical outlets and a switch.

A cabin that in theory would have cash flowed positive almost $1K/month had the kitchen drain go through the crawl space and dump out about 4' away from the house.

Secondly the kitchen could use some cosmetic upgrades as well especially considering the bathrooms look so nice. 

To convert the garage into an ADU, you would be adding a kitchen and bathroom.

She found a dead mouse in kitchen.

I let one tenant break his lease when GK Houses didn't initiate repairs to a kitchen in drastic need of sudden repair while the tenant lived there.

If the kitchen was not cleaned properly, it certainly should have been. 

My friend said his client nearly bailed when she found unexpected wiring issues behind the kitchen walls..apparantly the seller hadn’t touched that electrical since the Reagan era..but with a patient electrician who understood the local code and a carpenter who improvised a shelving trick in the diningrom, they ended up selling above asking.Flipping and building can get tricky, especially once you start thinking bigger.