I had always wanted to do caseload and had been waiting and waiting for it to come from when I stared in 2003, it started in 2008 when I was going on maternity leave with DS1, I could not do it due to the fact that DH is not really flexibile at all!!! He cracks it and carrys on if I ask him to do anything on his way out the door! Don't get me started that I need to get both kids up and dressed and out to CC on my way to work 3 days a week! Anyway back to your question I would tell him how much this ment to you and how you would love the continuity. But sadly if he is not on the same page as you then it is going to be stressful for you and not as enjoyable as you imagine.

Good luck and I hope you can talk him round, life is so much more complicated with kids!