wow, I'm still trying to wrap my mind around a single income being 6 figure. I think I drooled a bit imaging the comfort we'd have around here with that!!! I'm used to the mortgage alone sucking up over a 1/3 of our take home. That being said, I don't know if you have some sort of crazy dept, high mortgage, unreasonible medical expenses, or outstanding car payments BUT, if not I can't see any issues with the 6 figures you will already have coming in. Sure, 30 thou is a lot but, is it worth what you'd be giving up? If you aren't enjoying being cooped up at home yourself and your time with your kiddo can be recovered elsewhere then do what you WANT to do. If you don't like the job or the fact that it makes you feel bad about your kiddo's situation you'll probably end up calling it quite anyway. I think it would be harder to quit once you've gotten used to the extra money personally. If it isn't there to begin with you don't have to worry about adjusting to loosing the income later on.
May I ask, do you feel like your husband's income is enough to be at the comfort level you both would like? If so, and if you have no personal reasons for wanting to work outside of the money issue than why work? IMO 'extra' cash doesn't fill the gap left by working when you'd rather be with kids. If you NEED the money or you simply like being in the workforce then go for it, don't feel weird about it, kids adapt but, if it's only for 'extra' cash I can't see the rational in doing it.
~TRACY, wife to loving dh, mommy to dd (10/05), ds(12/08), 3 kitties, & 2 pups.