Yeah, the problem with the dash kit is there is only one, technically it is made for non-touchscreen cars, it's like 250 just for the dash kit, let alone piling on the adapters and head unit. I have the dash kit, and have been trying to figure out a headunit, at this point, I just need one that lets me control my phone (Android) through it, I don't want Android Auto as it doesn't work that well. I found a kenwood that is less than 400 that would do what I want, but its still a hefty price to pay.
EDIT: I also have no idea what to do about the cutout where you are supposed to put the radio screen that is on the non-touchscreen radios, but not the touch screen setup