But there are also a lot of reviews online calling this place a scam.

@Scott Goulet if that's the case and there is no significant difference in occupancy, then my gut tells me that it is not a major factor that guests consider and are willing to pay a premium for.

However, it is an old home and you are thinking about major cosmetic upgrades too.    

Until that happens, enjoy major cash flow. 

The vast majority of electric dryers run on 220v.

However, for major issues, STR insurance ensures you're fully covered.

If you’re paying off more than $1,500/mo I’d probably keep it barring any major upcoming capex. (3-5 years out so buyer wouldn’t automatically ask for it to be repaired at sale.)Good luck either way. 

Pittsburgh is home to many major universities including the rapidly growing Carnegie Mellon University which is “at least partially responsible for Pittsburgh’s growth, from revitalized neighborhoods to a vibrant and booming restaurant scene.”

But I believe for the majority of mom and pop landlords, it's not worth offering a concession.

Besides frozen pipes in the winter, there's also sump pumps that if not running, could flood a basement and cause major mold damage.