Decide if you are going to do the theory distance learning or in full time study. If you can, study distance learning as 6+ months in the UK with no income is pretty expensive.
Medical. Must be done at Gatwick. You're looking at around 200 quid.
Do the theory and the exams. Theory ~2-3000 Quid.
Exams. 14 of them ~800 quid.
Flying. You can do some of it in the US but I am not familiar with it.
So, you'd need to do at least 15 min hour IR conversion. I think some CPL work needs to be added too. Note, the CAA exam fees need to be added here. I think they are about 600 quid. The licence will cost ~200 quid or so.
This should get you a CPL/IR with ATPL subjects aka the "frozen ATPL".
Budget also for an MCC and add approx 20-30% for over runs and exam resits.
It does take a long time and you'll need to keep a healthy sense of humour about. You'll need it. Trust me on that one
Aurigny? I am not sure how they are going recruiting wise, look at
ppjn for info regarding the recruiting scene in Europe.