If you are planning to train under the FAA, then £15,000 may just about do it. If you are planning to qualify under JAA, then that sum sounds far, far too small.
Not nescessarily.
There is a company out there offering Internships, whereby you pay for the training to Instructor, then work as an instructor for them and spend a couple of years in the USA.
The result is that after a couple of years, at a cost of about £16,000 total after your instructor pay has been subtracted from the initial course fees, you have FAA CPL/IR, JAA fATPL and 1500 hours......
I won't advertsie as I don't want to break the Pprune rules, but there is another chap on these forums who is training along these lines, and he may be in a better position to advise you.
EA