Oh, sounds like he’s another one of those selfish
men who considers his partner a ‘wife-bot’ who is there to facilitate his life/make things easier for him/look after the DC. These men tend have ‘big feelings’ when normal service is disrupted - like the wife-bot malfunctions by being ill or tries to disrupt the status quo by not putting his ‘needs’ first, for once.
Men like this are selfish, self-absorbed bell-ends (been there, have the t-shirt and the divorce). Why the hell does he get to live his best life, doing the inflexible, low-paid job he loves, while you’re the main bread winner and assumedly cover child-related things as well? That’s not a team. That’s you, facilitating his chosen lifestyle.
When he says that your (massive) pay rise isn’t worth “disrupting your current lifestyle”, what he means is that he’s comfortable with things they are and he doesn’t want to put any more effort in re: looking after his own DC or have his life impacted on any way.
He didn’t even congratulate you?! Says it all, really. That’s not a partnership. That’s you and him leading parallel lives and you are covering for him financially, emotionally and pratically by covering most of the bills and childcare.
Why hasn’t he congratulated you, said he’s proud of you, asked you what YOU want to do? Because in his mind, it’s not about you. It’s about him. A wife-bot is not a human being, with thoughts, feelings, dreams. A wife-bot is a household appliance and you don’t ask the washing machine how it feels!
On your new salary you can easily afford a full time nanny. I think you have to take the job, if not you’ll always regret not giving it a try. And you don’t want to live with that sort of regret.
Out of interest, how does your husband react when you are unwell? Is he kind, supportive, caring, covers any child related stuff and household chores etc? Or is he irritated and impatient - stroppy that he has been inconvenienced? I mean, I could be wrong here?