Bon giorno Ste88,
I about to sign up for the IATPL course and from what I can see the program will take around 11-12 months. I am planning with a budget for 13 months.
I don't know if you are planning to take the ICPC/IR, which I think is shorter as you will not get ATPL ground school, or if you are planning to take the IATPL like me. Also are you planning on taking the Canadian program? The JAA program is not availble anymore from what I have heard.