So essentially your waking hours are 5.30am to 7.30pm (ish) and within that time you do:
5.30am -7.30am prep for the children, wake children, feed and dress children
7.30am-3.30pm your full time job (quick 8am pop down to say bye).......do you stop for lunch or just work through?
3.30pm -7.30pm take over child care, sort kids tea, get kids bathed, get kids ready for bed, put eldest to sleep around 7.30pm
7.30pm- 8pm ish maybe watch something on TV
So in your entire waking day you have maybe half an hour available to you if down time after the eldest is asleep, maybe your lunch break.....what do you do with your lunch break? Or do you work through?
What does your husband do?
What time does he get up?
7.30-8am he has fully dressed kids to finish off and then he takes them to school/nursery 2 days a week (at which point he comes home and does a little bit of surface sorting and.....????)
On the three non nursery days he brings the 18 month old home with him and entertains him until 3.30pm (is the 18 month old still napping, for how long? What does he do during nap time? Chill?). At 3.30 he then hands all responsibility to you for the children until he puts the youngest to bed (so what does he do from 3.30 to 6.30pm?!
And let's say eldest of down by 7.30pm, what time does he go to sleep? So he has time there.
It sounds like your entire waking day is spoken for bar the 30mins after eldest goes down.
Sounds like he has a cushy life .. no wonder he doesn't want to go back to work!
Stick youngest into full time nursery for 6 months so he can't claim to be primary career and then LT lazy B!!