I was able to meet lot of great folks, drove around everywhere checking out different neighborhoods (low income to high areas) and properties.Loved the diversity, and was very impressed how well maintained and clean the city was.  

so work force more diverse.. but that also leads to very moderate gains in values and values because there are so many rentals are really related to what one will pay for a given cash flow and the 1% rule seems to be the bench mark for OOS investors to take the leap to other markets.. unlike the west coast were our locals are happy at the .05% rule... there is no way they are going to Memphis or Cleveland or any other mid west market for the 05% rule.. why would they with no real value growth there are better ways and safer ways to invest.So where does the investment real estate inventory come from.1. burnt out landlord syndrome there are areas of the city that many won't work in @Chris Clothier commented on those neighborhoods in a thread earlier this week. 

There are around 1 million short-term rentals in the US, another few hundred are not going to impact the market as a whole if they are regionally diverse.     

It’s a diverse community, one of the most racially diverse neighborhoods of Detroit, that borders Grosse Pointe.This is one of the few historic neighborhoods left in the city where you can still buy properties for rent and make a solid return.

Its a job / population growth story w/ a lot of diverse industries and good quality of life at a reasonable cost that will continue to attract businesses to move here.  

Hollywood has a real diverse crowd. 

Decreasing rents erases cash flow.Those with low risk:Investments with large amounts of equityInvestors with large reservesThose with diverse portfolios in the highest demand property types.If you want to protect yourself have cash reserves and do not over leverage yourself.

Are there any Internet tools in particular that real estate investors like to use regarding analyzing markets and sub-markets such as population, employment, economic diversity, ect?

I am not sure how familiar​ you are with JC but if you want to invest in the area i think you should drive/walk around the different areas, each one has its pros and cons and they are highly diverse.

With respect to one side of the river or the other, the Cincinnati market is obviously much bigger and more diverse with respect to real estate investing.