@Rey Magana Welcome to BP.You didn't mention what kind of investing you are interested in.Is it singlefamily or multifamily?

But as mentioned.

A few others have me mentioned other rust belt cities reviving because of cheaper housing prices, rising rents, and new business moving in.  

Generating 11k per month - what amount of capital is that requiring - you mentioned 7 paid off houses.

Structural repairs are really unknowns, as others have mentioned in this thread.

As mentioned above get involved locally. 

I wish you would have told us the year, it makes a huge difference.Anyway, everything you mention, plus 1) get a camera run on the sewer line, 2) make sure the Elec panel is newer and sized correctly (a lot of HIs will just say if it's functional or not) 3) Foundation ( is it slab or raised?)

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

@Mark Lee this is a team that I have used multiple times and like it was mentioned, they don't have to be anywhere near you.

As has been mentioned, guests will find you on VRBO.