I realise that this is a very first world problem, but would welcome a range of advice on this.
Background: I am the sole earner (husband is self employed, but very variable earnings, he does house / kids etc, works very well for us). I am currently on a very high salary which keeps us comfortable, and means we don't have to worry about cash. I am 20 years into my career, and I have run large scale teams / am an expert in my field / etc etc. Obviously this comes with a degree of stress, but I am happy with this and my previous life choices to get here.
I have been offered the opportunity to apply for a 'sole contributor' role in my profession. It completely fits within my skillset, and I have done this in the past very happily. There is no line management and would be a relatively small / flat team structure. It would be 3 days a week from home 'once Covid is all over'. The other 2 days would be a 30m drive away.
I currently wfh full time due to Covid, but when things are back to normal again, it would be 3 days a week in central London (1.5h commute, train / tube fares). Given I went back to work 9m after having both my children I am very much enjoying (mostly!) being able to take them to school / be at home when they come in / be able to see them in the evenings etc. It was a sideways move from my previous role (redundancy situation, I thought it would work for the moment) but still a career role.
The new role would be a 25% pay rise. It includes private health insurance, very good pension contributions and 5 more days holiday than I currently have. It is in an industry which is booming as a result of Covid and I do not see this changing going forward. However it would pretty much kill my career stone dead.
The extra money would mean we could go on more holidays (when we can!), put more into savings (could retire sooner, children's uni funds etc), finish what we want to do to the house and garden sooner. Plus obviously give us a general buffer against Life Things.
What would people do in my situation?