Wanting a 18x9f 18x10r wheel setup am I crazy?

Not for me I did it myself with some help and lots of lube lol! Some tire shops will give people hell for stuff like that but unless you can do it yourself you're kinda at their mercy. Just tell them its a show car only. These rear tires call for an 11.5 wide wheel minimum for good reason, on the 10s its a ***** to mount up and I'm giving up a couple inches of contact patch as well. But I call bullshit to anyone that says its for safety reasons.