Hi FrankFencepost. Only concerning the wheel offset issue: We don’t necessarily have to stick with the OEM offset. Wheel width and offset can be juggled to give the necessary clearance on the suspension/brake caliper side, and still have a nice aesthetic look on the fender side, so that the wheels/tires fill out the wheel well without rubbing the fenders.
There is usually room to play with offset, since most people go to a narrower winter tire than the OEM all-seasons. Therefore, in many cases that makes it possible to also change to a narrower winter wheel with a different offset than the OEM wheels.
There are online wheel offset calculators which allow us to play with offset and wheel width in order to compare an aftermarket setup to the OEM setup.
Here is one:
https://www.1010tires.com/Tools/Whe...QZ861QHV5d1VTFSVhziMvaLc4fQ1bn7NWai60YY6GDSfV
Others can be found by Googling “Wheel offset calculators” and similar terms.
It can seem complicated at first, but is actually quite simple to understand once the wheel width/wheel offset relationship clicks. All we need to know is the factory wheel width/offset, and the aftermarket wheel width/offset.
Hope this information helps and good luck.