The NHS consultant salary is standard is publically accessible. https://www.bma.org.uk/pay-and-contracts/pay/consultants-pay-scales/pay-scales-for-consultants-in-england
The pay will increase, but not shoot up with seniority. It maxes out under £140K after 14 years as a consultant (so 14 years from now for your husband).
I am on the final paypoint, based just outside London. We could live off my salary alone but we couldn’t our lifestyle if my husband didn’t earn similarly (in a different industry). I get the impression that our lifestyle is much more modest than what you are aiming for. We have good holidays and my child can do the extra-curricular activities they want, but our lives are otherwise cheap. We don’t have very little interest in appearances, so we run one small old car, have no hair or beauty treatments, no expensive clothes or hobbies, and we rarely go out-out. We don’t have a cleaner. Also, part of the reason we are financially comfortable is that we only have one child, and they were born when we were both quite old, so the mortgage had been paid off before any childcare costs started.
One can earn more by taking on extra PAs of work in the NHS or doing private work. If he wants to do private work, please note that he would often have to offer his Trust an extra PA first. I have never had an interest in private work, but my understanding from friends and colleagues that do/have done it is that it is not particularly lucrative any more and it seems like you have to go hard at it to make it worth the cost of hiring rooms/secretarial time/imdemnity.
Ask yourself whether you want to be doing the grunt work at home whilst he is getting burnt out on his non-NHS weekends, barely seeing you or your family trying to keep you in the style to which you wish to be accustomed. It would be a miserable existence for him.
From my end of the career, I think he is very wise to protect himself by not taking on a private practice, aside from any principles.
The other option is to emigrate to a country where doctors are indeed paid royally (but still working hard).
A purely NHS doctor spouse in the UK is not the right choice if you wish to be a kept woman.
(This is aside from any consideration of what would happen if life deals some nasty blows in the future, or any sense of satisfaction you may personally get from work).