Gosh,, I sure hope you and your wife worked out the real financial aspects, health insurance, child care, the real take home dollars, etc..  before you make that decision. Doing the books aren't that time consuming,, and not that challenging after a few months of doing them. Granted if you're paying child care now,, you will save some money,, but insurance etc.. will gobble up that money without even a burp..

The other aspect is how much your wife interacts with other's in her current job. It's going to be a drastic social change and I'm betting she currently does her shopping at the end of her day ??  That too will change, just grocery shopping will be something she has to drive to town for,, a different situation than just "picking up a few things" on her way home at the end of the day.

Yup,, she will probably be your #1 "parts chaser" but it can get "old" being together 24-7-365. (don't forget you too will be missing out on any "social interaction" when getting parts etc.. in town)  Which means you both will want more social contacts both together and seperately. 

Not trying to influence one way or the other, just thoughts I have.

Remember too,, I'm not married, and I live alone. The only one unhappy when I leave the yard is my Dog and he's just bent cause I didn't take him with me.  And, yes just getting a couple of stupid little parts in town can kill 2 hours so fast it amazes me....   unfortunately,,, although it's "his pickup",, he has not mastered driving,, and thou he undersands alot of what I say, he still lacks talking skills.. So,, just sending him for parts wouldn't work out too well.