The jist of your research is ok, but your facts may be slightly wide of the mark. All in all, you could do the following:
PPL/Night = £5k
100 hrs building (in the states) = £6k+2k for accom/flights
ATPLs = £5k
Multi Engine/CPL = £6.5
IR = £13K
MCC/JOT = £4K
Test costs = £3k
Total = £44.5K (don't forget additional living expenses)
Hence, the question of why you should spend the 58K (plus3K for test fees) is a difficult one to answer. Personally, I would use the additional money for a flight instructor rating, or a type-rating. It's a hard sell to see where the APP gets you. Unless it is a guaranteed job at the end (which it isn't), then I would do the modular.
My own research is to do ATPLs at Oxford, and the flying at PAT, or somewhere similar.