grumpyfish52: Our finances don't depend on it, but it would be a great stepping stone for the future and would allow us to buy a bigger house etc.
Might this bigger house catch you and him into the permanent snare of him having to do very long hours, though? You might have to consider the industry your DH works in to know whether this is one of those "always giving another inch and never getting a yard back" affairs. Some careers, there is a break-point where when you get above a certain step, you clear the truly hideous stuff and start to get a lot more freedom. If this is one of those where it just gets harder and harder, or only very few people hit that magical oasis of calm, then not a good step.
At the moment he works about an hour away and absolutely hates his job, he doesn't see much of the DC at the mementos anyway (usually back about 7.15 when DC are in bed) so I'm not sure how much would change in practise re time spent with DC?! Except that he would be exhausted, of course.
Hnh. I guess again you would have to consider how much of a loss it is for your DC that they already see him so little, but now the time they'll get with him, he'll be shattered. Some people can soldier on through chronic exhaustion well, but other people can't and it takes its toll on every aspect of family life.
If there's a clear, coherent endgame, where, for instance, the goals are, e.g. a healthier family life resumes after X amount of career progression, and/or you move house to be closer to the job, then there are reasons for proceeding cautiously. But if it's motivated by nothing more than money, then I think that payraise will cost in many more and deeper ways than you might have imagined. I think you'd need to set out with your DH what the goal is, when you know it's time to stop, and the measures by which you'll judge that you've got what you want out of it. Take care to do it, though, before you start mentally spending the money, because that will only cloud the issue.