I think I'll ultimately get my front wheels widened to 9". They didn't make a 9" wheel with the correct backspacing, so that's how I ended up with an 8".
Haven't thought much about widening a wheel, probably not cost effective to buy wheels with the plan to get them widened. But an interesting idea to mull over.
Looks like an 18x8 with a +22mm offset turns into an 18x9 with about a +35mm offset if it is widened 1" in the back. But if it's much more than $150 a wheel, hard to see it making more sense than just buying one with the right offset.
Not knocking your idea of widening your wheels, just thinking out loud on the idea of using it as an avenue to get where I might want to go. You already have the wheels and they don't make ones in the offset you would need so it makes sense to look down that road.