I am sorry to hear of your inability to obtain a class one medical. It is never nice to have dreams quashed by something outside of your control. In your shoes I would probably pursue a different career and use my spare cash to enjoy flying for fun, but that’s just me.
I do not know much about the FAA’s medical requirements, but before you consider starting down that path, go get whatever medical certification they require.
If your father is looking for additional work, I think Magnus Flying School at Welshpool have been looking for a CAA instructor.
Good luck.