Working in Oxford university

I am a Sys admin/Devops with over 10 years experience. At my current job, i am getting good pay and savings, though career wise , it is a hole with no career/professional growth. I had applied to oxford university and am in final stages of hiring process. Though salary is way less and savings is also less.

With a family of 2 kids , what would you folks suggest? Jump to oxford or stay put where i am currently and make savings ?