No doubt someone will say this is not always the case....But one of my friends did the IR conversion from FAA. He had to live at Bournemouth for a month, didn't fly for the first week so spent the time hanging around, then they didn't fly at weekends, then they did one hour per day in the aeroplane / or sim. Grand total of a bit over 15 hours + test+170A, 28 days B&B, and £000's., not to mention loss of income as he was self employed. He already had the ATPL's and JAA CPL.