I'm not sure if you really meant that you wanted to work but if you did, you might check into tutoring through your local school district. It pays well and in many districts is only 10 - 15 hours per week.
Eh, different strokes for different folks. I know people who have it all joint and those who keep a separation. Every couple should do what works for them just make sure that both are aware and could find the money if they needed to.
Our district does not hire tutors. Around here, parents pay big bucks to local companies that offer after school tutoring (it's a predominantly "Asian Tiger Mom, our kid needs to get into an Ivy League" city). And parents around here only want to hire tutors that have graduate degrees. Not kidding.