MF is much more efficient and cash flows much better; it is great to have many tenants under one roof. 10% for PM is pretty normal; but watch the add-ons for getting new tenants and arranging calls, visits etc.

You are correct that there is no school tax adjustment for non-owner occupied properties.If you visit the county tax assessor's office, they can calculate the exact amount of the property tax bill you will receive for a proposed rental acquisition.

We went to the county recorders office who sent us to the district court, who told us they couldn't print a list out for us and to check their website. 

I think there is a similar service for home sales, but not sure.Still with your lack of experience, you really should consult a realtor or just visit open houses on the weekend. 

If you want to save yourself a lot of time go visit the neighbors and see if they have big mouths. 

I will attach their website as well. http://ersi-usa.com/

Most websites list maintenance fees and minimum down payment but N/A for taxes.

This website provides useful data on shootings in Chicago neighborhoods, https://heyjackass.com/.

You can use the county assessor website in any county to get a pretty good idea of what the total square footage is.

Also, what website would I use to target absentees, evictions, foreclosures, etc. to gather my list to send direct mailers to them?