Does anybody have any recommendations on finding an Audi Specialist Mechanic to do a pre-purchase inspection on a 2014 and 2015 rs5 in the Chicago/Chicagoland area?

I've been looking at 2 RS5s in Chicago, but the 2014 has 52k miles and the 2015 has about 65k miles. I'm not very knowledgeable about cars, but I know this is a good amount of miles for a German sports car and want to make sure I'm buying something that won't cost me $5k in maintenance a month or two after purchase.