Before you do anything, go get a first class medical.
If you feel time is not on your side and you're single, sell everything you own and
come to the US. You can earn a PPL within a month, have your I/R at 125 hrs and a commercial license at 250 hrs. Then take your
Instructor rating, and Multi, and hour build like hell (legally please). It's going to cost around $25000 give or take. By the end of 12 months you should have around 350-400 hrs.
While you've been doing this, instead of hanging out at "Cheers", study towards the Euro license. (If you can find a local that's worth shacking up with this may not be necessary ie green card. You may be able to stay and find a job here).
Get all the info you need on converting your license BEFORE you spend a penny. Check with CAA and local Colleges etc.
When you go home you should have all your ducks in a row and take your writtens, then your flight tests (with appropriate training) for I/R and CPL.
If you're married, outline your dream and convince your better half that doing it piecemeal will be more expensive (constantly going over the same stuff due to lack of consistency) and will take MUCH longer. Remind them neither of you is getting any younger!
I basically did the above, got my UK ATP,
found and married a yank (in London!), moved back over to US and now fly for a major.
It ain't cheap but it's worth it. It can be done. I realise I was very lucky but then, sometimes you make your own luck.
Most importantly never give up. We're all gonna be dead an awful long time!
ps One of the guys in my class was 47 yrs young!