I agree with everyone else.... if it's 50% custody anyway..... essentially if you have them on the weekends, and he has them during the week (with times for him to have the occassional weekend as well....)

Most of the children I work with, are in a much better place if they have a single home during the week - that's not to say the shared care arrangements can't work - but so many times the one night here and two nights there, and one night back there, and 3 nights over here... just are too confusing for kids.... it doesn't really matter which parent it is, as long as there is a stable, familiar, consistent routine for kids.
If you trust that he will look after them well, you will be a much better parent for making that decision - as long as you stay in their lives regularly it will work out.

Good luck! I hope it really does work for you xx