Am I analyzing this correctly?

[Sam G.]

I'm trying to educate myself about turnkey properties and have stumbled across this property on Roofstock. I know nothing about Indianapolis or if the house itself is well-priced or really any of the due diligence that would go along with buying a house. 

However, I ran some rough numbers myself and came up with a cash-on-cash return of over 15%.  I then punched everything into the BP rental property calculator and came up with around the same numbers, depending on things like vacancy and repairs and whatnot. 

These seem like good numbers at first glance. Is there some huge error I'm making or something major that I'm leaving out? I just want to make sure that I'm doing this the right way moving forward.

Thanks!