what @Gareed Said. Also make sure there isn't something unexpected happening ( i.e. amazon fulfillment center) or the likes popping up near by. Talk with the city about any employers that might be leaving, any that might be coming etc.
I probably would not feel comfortable buying it unless its offset with a good amount of demand.
I would def want the price to be really in my favor as well. In IL, i think it makes sense to be in the better areas where you have stuff going on but not some of the smaller weird towns ( example Cairo) but this doesn't sound like its it.
At the end of the day you really need to be comfortable with it.
I tried to buy one park , one time that was in a no metro area area and my test ad pulled in like 1 call.
At the end of the day, I was ok with it from the research i did but the park was full, the tenants all owned their homes, lot rents were low, price was great, all direct bill utilities. If it was a turnaround in a weak area, i probably would have passed.