Not a smart move on your part. To the best of my knowledge, the City of Detroit requires a pre-sale home inspection. http://www.ci.detroit.mi.us/Departments/BuildingsSafetyEngin
Mine home was several pages and they found lots of items that were required to be corrected prior to sale. When they came out for re-inspection, the second inspector found several additional items.
I suggest looking at an inspection package before considering giving up your rights on this. Lines are long in the afternoon.
Why wouldn't you want to know the code violations on the property? If you want to lease the house, it won't pass inspection. So, you won't be able to be certified. It can cause you problems later on. They give you six months after you close to do the repairs. Have the seller pay the $295 for the inspection. You want to know what you're getting into. Yes, there are ways to close without doing the inspection.