I have been investing in the western IL area for about 7 years now and have looked at Rockford MANY times and have yet to pull the trigger... here is why:
1. Property Manager: you will find it very hard to find one that is willing to take on more property, hard to find a good one, and the price will not be great...I had six properties lined up and called 5 property management companies and none were looking to take on more at that time...the area is rough
2. The tenant pool is not good. One property I looked at the owner had to carry a gun to collect rents! Literally it was the only way he felt safe..lots of late or no pay people and lots of crime
3. There is really no "good" section...there is REAL bad and PRETTY bad and not AS bad areas and that is it
And finally, IL is not the best state for landlord rights. I am not saying NOT to invest in IL, but if you have the option of 49 other states, looking for a fair state and good cash flow you can do much better. For example, I own on both sides of the Mississippi river...rents are about the same in IL and IA but property taxes are 1/3 in IA...less taxes at the same rental rate means MORE MONEY!
Two tons that LOOK great on paper that I would not invest in are Rockford, IL (or Freeport as it is just as bad and next store to Rockford) and Clinton IA (where I own a 14 unit building I would be happy to sell to you that cash flows great and is an honest pain in the butt)...so on paper the Clinton property looks great, but in actuality it is not good: City is horrible to landlords, tenants have lots of issues paying, it is like Rockford where you feel it is the nicer part of town and then realize there is no nice part
I would suggest you look at Iowa (anywhere but Clinton unless you want my place!), Missouri (not St Louis but west of there like Fulton, Montgomery City, COlumbia and so forth, or Indiana.. all three will give you similar rents with much less taxes and look OUTSIDE the big cities, the smaller towns tend to still have people that come from farming communities and understand they actually owe rent, they can fix a lot of their own issues and even if they are late they tend to know they need to pay