Sorry, if I have missed something. The obvious thing to me would be to get an FAA IR along with an FAA PPL (or CPL for that matter) and then put my aircraft on the N-register. No doubt many will warn you of the potential future hazards in taking this route, but the actual hazards today seem to be pretty low. In the meantime, you will be free to fly all over the world in IMC. Have Fun!!
Couldn't agree more!! That's what I did (CPL/IR).
It's just very complicated (or impossible) to arrange the FAA checkride in Europe, so some time off and off to the USA is the best way.