@Iwishididntwork for reference I worked part-time when DS was a baby for 11 months. Three days a week. I had a big job then and found both the losing the edge of strategy and the sheer exhaustion of dropping at nursery, getting the tube, dashing back absolutely awful. I gave up, principally because ds was always sick but it was awful.
When dd was settled in reception I switched careers, going back on the very bottom rung and for peanuts, but the job was school hours and there was no childcare to pay. I did it for two years and have never workwd harder in my life. Dash to school, dash to work, dash home for 2.50 and get the laundry in, hung, dishwasher, tidy, whizz to school for 3.35 then roll into cubs, rainbows, swimming, ballet, tennis, teas, etc. Dinner on the table at 6.30ish, reading, kumon, bed. It's absolutely exhausting to do a good job at work and do everything at home on top. Mind numbingly exhausting and busy.
After two years, I was promoted two grades up but had to go full-time. That meant an au-pair and more sub-contracting. After that was paid for I had exactly the same money left as part-time but two grades lower. Work sponsored my professional qualifications because I was full-time and shifted into that trajectory.
I always took the DC to school but the au-pair collected and did all the after school stuff and gave them tea. I got home to them fed, the laundry done, the dishwasher done and a tidy house. Also, I took a full lunch break a couple of times a week and used it for buying the endless party presents/admin, etc..
there was a two year grind of college on a wednesday night and getting up at 5am to do the course work, but it was worth it
I have just reduced my days to three aged 65 and it's a good balance with grown up children and I am more productive at work because I'm less tired. It didn't work with lottlies and earlier career.
Good luck. However, sort your husband out. You cannot make the same contribution from part-time money. Spreadsheet time and he has to understand that some of the childcare costs are his costs too.