I've got to be honest with you. In all of my families, I've paid for career upgrades (immediately after gaining the one below so I'm not wasting my money!) so my peeps got to Level 8 as soon as they could. That way, they can do other things around the house. I did this until I had all 3 rooms mastered. In future generations, I get them started, then let them go. It's more fun to see Mom playing the piano and Dad sleeping in the hammock than it is watching them work!

Yeah, they don't make that bit of money with every work cycle, but with 10% interest and picking up collectables, there's not much need for them to work.