You sayyou have £39k. Okay. Have you got a class 1 medical passed yet? If not, do that first.
You could, in theory, do all of your training in the UK with the money you have, including the instructor rating. You just need to break down each course cost and look for good deals. ie PPL=£5k, Hour building=£20k. ATPL's=£2500. You could always buy a share in a small a/c for the hour building then sell when you have done the hours. I bought a share in a Warrior for £1750 and it cost £35hr to fly it and £50/month for hangarage etc. That was inclusive of fuel. Training in the USA isn't always cheaper overall. You have living expenses to take into acount, travelling, etc.
Do the math, but get the Class 1 medical first!!
Good luck.