2001 Ford Ecosport Slow Start

Almost 2 years ago, my car start to start slowly. It turns over just fine, but it won't catch or "start" until the 3rd or 4th turn of the key. It ALWAYS starts, it just takes awhile. I have taken it to a few places but no one can tell me what is wrong with it. I replaced the spark plugs, but that didn't help. What do you think? Also, on average, how much would it cost me to fix in the Midwest?

Thanks!