"Hint 1: you most probably will not be happy after quite a short time with a 2-seater, if you have spouse, kids etc. You come along alone with soe occasional friends, "
Not my experience. I owned 4 seaters (well, aircraft with 4 seats) for around 16 years and have owned a 2 seater for 8 years - no plan to go back. Family with 2 kids all love to fly but want to sit in the front and get involved. To get the family in, in one go, I would need an aircraft with at least 180hp. My old 172 would just have managed 3 of us.
"The corrosion inspection from the "Aging Aircraft Initiative" did hurt old Cessna owners during the last 2 years, but all other manufacturers will follow, so no difference to every other aircraft."
So you are telling us that a wooden Jodel is going to need an aging aircraft corrosion inspection
Rod1