Also don't underestimate the theory course requirements. They are way, way higher than the IMC/IR(R). 7 exams, almost at the ATPL level, with at least two solid days of in-class brush-up training required, in addition to the self-study at home - which may take several months assuming you spend an hour a day, 3-4 days a week.
A typical training course, including the two-day refresher but excluding the exams, will be about 1900 euros. The individual exams, here in the Netherlands, are 100-130 euros or so. Each.
I have just started the IR theory course (EIR & CB-IR), and it's a lot more than I expected.