To ask you to help me decide which life I want?

[ExtraPineappleExtraHam]

So I've just seen a new job on Indeed this morning. I've got loads of relevant experience which makes me think that if I we successful I could ask for a figure at the top end of the salary expectations.
Trouble is, I only started a new job in November. It was supposed to be my forever job as it's ten minutes walk from home and five minutes from dd's new school (she starts reception in September.) I've managed to get my contract changed to 9.30-2.30 most days so I can do every pick up and drop off. However, the pay is awful. It's for the NHS so no pay increase in sight, and they've just made all the people on the band above me redundant so it's unlikely another role in my hospital will turn up. My supervisor even told me that I was in the wrong place if I wanted career progression.
When I accepted the job I thought this would be ok as the 'benefits' outweighed the rubbish pay. Now I'm struggling so much that I'm not sure I can live on £800 a month forever!
The new job is a 45 minute commute away and the hours are going to be hard to find childcare for as they're 7.45 starts. The pay is so exceptional though that it really would be life changing for us. The best option would be for my dp to quit his job which is minimum wage, so he could do school drop off and pick ups and look after them on Saturdays whilst I worked. He could find a job on similar money working a few hours in a supermarket or factory. The pay couldn't be any worse so wouldn't this make more sense as I have the ambition and degree? He would agree that I am more likely to get a better job than he is, I'm not trying to be harsh.
Would you consider it or stick to the original plan? Obviously this is all hypothetical as I haven't even applied, let alone had an interview!

It's not that it pays badly, it's that it doesn't pay enough, from what you are saying, to offset the loss of earnings of one partner and the increased stress/workload on the other. Don't underestimate the amount of money that commuting takes. I did a 45 minute door to door commute for years, and I thought I didn't mind it. The first month I stopped doing it, I couldn't work out how I had so much money left over at the end of the month. I ended up riding the fuck out of so many cars as well, even though I drove complete workhorses. There was something going in the car every six weeks. I now have a 15 minute commute, and even though I've cut my hours by about a third, I end up with only slightly less disposable income at the end of each month, and I've never had so few car problems.