In case it helps, this is my experience.
My DH was a high earner (investment work) who was made redundant last year after his boss messed something up so had to make several senior staff redundant. It was tough; I had to up my hours and as I don’t earn anywhere near an investor’s salary, we had to tighten our belts. Luckily we have savings, but it was stressful and still feels it sometimes. I understand your sadness at not being able to spend more time with your kids, but at least one person is always going to draw the short straw in that front, just make the time you do spend with them count.
Looking back, I should probably have gone a little easier on DH re: job searching because it was actually a huge shock and dented his confidence. (I have since apologised.) But don’t underestimate that your DH may feel bruised by the redundancy and may need a bit of sympathy and support too. Especially if he is around 50, when it is getting harder to get work.
What got us through that period was being very clear with each other about roles and plans. My DH and I agreed that he would have a year to try to set up a consultancy business, but would keep his name on the books of recruiters. If the business doesn’t work out, then at least he won’t have a big gap on his CV. We also agreed that since I was stepping up with work, he would take over most of the house stuff. So he did all the shopping, cooking and school runs etc.
It is working so far and he has bagged some high paying consultancy work. I hope the business works out. But even before he started getting the work, we discussed it and he showed me it was real and that he was making progress (setting up a company, sorting out insurance etc), so I didn’t worry his plans were idle fantasies. That might be something you need to discuss with your husband.
But as well as communicating about that, what helped was that it was and is very clear to me that DH’s focus is on ensuring the best for the family. I know that if things don’t work out he will take a job, even if below his previous seniority or wage, for the sake of our family. You need to be sure your DH will do the same.