Just a word of caution if you're planning to do the ME IR part-time. I'm sure it
can be done, but on my full-time IR, most of us felt pretty rusty on Monday mornings - after just two days out of the saddle. And I certainly could not have managed working at the same time, the flying was just too intense and demanding.
I'd suggest planning for significantly more than the 50 hours if you're going part-time. Good luck!