I am a SAHM and have one child in sixth form and the other in secondary. Initially I worked, part-time and Dh and I shared the drop off/pick up from nursery as we only had one child at the time.
Since then, Dh's job changed and we relocated. At that point I had to leave my job as Dh's career was much better paid than my job and it made sense to be a trailing spouse (not the first time we relocated for his job.)
Because we had initially shared the nursery runs, Dh has a full appreciation of what is involved in juggling work/childcare and a sick child as we did it together.
My health over the years has deteriorated and it would be difficult for me to even work part time. But Dh doesn't want me to anyway. I do all the housework, cooking, cleaning, laundry, shopping etc homework, book reading, school admin. Dh does cooking on the weekend as he loves it, and house/car insurance. The children take the bins out 
I have provided childcare for an inset day because there is no childcare available here for that. I can cover all the 13 weeks of school holidays and have done for other people, usually best friends of my children. I am here for when norovirus hit and took down both children, separately.
If you are going to sit down and have a conversation about even the idea of returning to work, you need to list everything you currently do and then tell your Dh he needs to be prepared to do half. Discuss sick days for the children, how you will divide up school holidays. Start from a full time job position, do some research on salary/hours. Some people are just blind to the benefits of having a SAH partner. Plus then the cost of childcare, before and after school clubs, holiday clubs etc. Remember that if you use a childminder they are less likely to collect your child from an after school activity too.
Dh openly admits he loves nothing more than coming home to a cooked family meal and after dinner plates are in the dishwasher there is no housework to be done.
I don't have to justify my SAH status to anyone, yes housework does not take all day. And? Dh is fully supportive of what I do. His own Mum was a SAHM and he has great memories of spending time with her, even in his teen years.