It depends where you work. There is a reason why Lakewood Rabbaim commute to the City (or spend their weeknights there and only go home on weekends or once during the week, I know of an example). Lakewood doesn’t pay much (if anything. I have heard some schools only give something you can place on your resume, but no money).
If you work in RAMAZ, expect a lot (but good luck getting a job!).
Economicly (and I will get yelled at), make sure that the salary you earn is worth the time spent and the (Gov) benefits lost due to working (instead of Kollel?). You may “earn” more taking care of your children (which is not a bad thing to do, either).
Good luck