You would not be the first one to obtain a double FAA and EASA PPL license then do the rest of the training in Europe. One of my course mates did exactly this and worked out very well for him, he obtained his PPL in Florida. However, be aware that you need to reserve your spot for the CPL-ME-IR, the waiting list for it is quite long and you have to give a realistic date to allow yourself time to pass ATPL exams. Postponing and finding a more suitable date at a second moment is not a given. The school is very busy and they try to keep the intake to a maximum of 9 persons per class per month with the aim to assure a steady pace of training with no interruptions. If you finish with ATPL exams earlier there might always be the odd cancellation and you can get in a course earlier, but that does not always happen.