One of my properties the city condemned it and had the lady removed before I bought it, and it was so full of roaches they had to tent the entire house and cut away the bottom third of drywall from rot and mold. 

Potential renter assumes he can use standard modern equipment with a ground- that requires a ground or it wouldn't be there.

I had built a new build on Aiken  First modern design on that side of town ;)

ya that's basically mission impossible under the scenario you outlined.There is a lady I know from Oregon and this was her and her moms experince.They bought a duplex  ran that for a few years sold and bought a 4 plex ran that for some years then they were able to buy a 8 unit  then next step was a 20 unit. 

Quote from @Ashley Madalone: If your market is predominately male buyers, I'd consider the man cave, but my market is predominately female so I wouldn't consider it.But I have built 'She-Sheds' that the women just love, especially Tack Rooms for the horse ladies.

I have a phone number and name of a lady and email but she said the investors don’t have a company name. 

These updates modernized the property, improved its curb appeal, and significantly increased its market value.

By adding an additional bedroom and putting modern updates throughout the home.

Although in Canada it was/is the Ensuite room. and even here on Biggerpockets one lady got on about how she is lobbying in the state of Indiana to have the term Landlord removed from the vernacular and replace with  ( Housing Provider)  the thought being Landlord denotes Lord of the land and superiority over the tenant I guess is the point. 

Modern investors can get fixated on the necessity for an STR license and they hear all about 'how much' their friends made on BNB.