Nadia.While Cincinnati is a great market, the price to rent ratio is pretty low since the city has blown up.

I have 40 spread among Livonia, Westland, redford and garden City

I like the idea to get official inspection done (from the City, for example) and present it as a proof that the work was not done or was done incorrectly, or no proof of permits.

i have a tenant paying half of market rent. in my city, 4 unit and above are all rent controlled...  

I know certain parts of Aurora are sketchy, so I am looking for some advice on zipcodes/streets to avoid.

The way I see it is if the property taxes are so high to keep from getting ahead with your rental it doesn't pay much to keep it or look at that area to buy.We had a inner city 6 plex,, our taxes jumped from 5400 a year to 6800 ... on a 6 unit building this was after we had contested the tax hike that's 133.00 per apt per year or 95.00 bucks a month just for taxes.per unit.. we contested the increase hired a appraiser had a meet and look at with the city appraiser.. it knocked it down for a while but went right back up a year later.. 

You can google street view the streets and see how many board ups are there - and if there are more than a couple you may have trouble finding tenants.

Mykael Williamson many cities are trying to get Amazon to open their second HQ in their city .

@Michael Biggs I just drove there today and there is still water in the majority of the streets.  

There are only multifamily properties on this street.