OP if you are from a wealthy background I imagine you are thinking you’d want to have kids in private school, a nice car (probably one each so 2 nice cars), nice detached house with big garden in a desirable location, designer clothes, a fancy skiing holiday in the winter and several other holidays a year, maybe a second home, a cleaner, a nanny/housekeeper etc. And I can understand it would feel hard to “downgrade” the standards of living you experienced as a child (I obviously don’t know your exact background!), though of course many people live perfectly good lives with children on far less.
However I think you need to be realistic here and have a frank chat with your partner as although he earns very well, a consultant’s income just doesn’t go anywhere near as far as it once did (it also doesn’t go up much from here), and you simply won’t get that kind of lifestyle as a SAHM in this partnership, especially if you live anywhere in or near London etc. You guys really need to discuss your outlook on the future as it does sound like you have a very different vision of what that might look like currently.
Unless you have significant family wealth behind you that you’re happy to dip into to fund it (as you haven’t mentioned this I am assuming not?) Or unless he goes into private practice. I’m a GP and I suspect that private orthopaedic surgeons won’t be short of work anytime soon and indeed it’s been the case for a long time that they are in demand. So he is very likely to have the option to significantly increase his earnings via private practice if he wants to. Either way he is highly likely to be working long antisocial hours and expecting you to support him by really shouldering the majority of housework, childcare, “the mental load” stuff. All the orthopaedic surgeons I have met (all male), actually all surgeons of any kind I have met, do not lift a finger at home. I’m not saying that’s how it should be but the reality is that’s the default right now. So in some ways, all the more reason you should be a SAHM, as it will be incredibly difficult for you to fill that role (which it sounds like you’re happy to do) as well as working.
So essentially one of you is going to have to be flexible here, either he goes into private practice (which currently it sounds like he is opposed to, and it’s actually lovely to hear of an ethical and principled orthopaedic surgeon!) or you 1. give up your plans as a SAHM or 2. accept a significant downgrade in lifestyle (I agree with a pp I do think you’d still be able to afford Netflix TBH! But not the ski trip to Val d’Isere etc) And you seriously need to talk about this!