Looks good to me! Your budget is nearly identical to ours minus the daycare and we manage to save about 2000 a month. We are expecting our first child in July so this will obviously change.
Just out of curiosity, are you expecting your DH's income to increase or do you plan to cut back spending in order to SAH? I feel like we could swing it on DH's income alone but it would definitely mean some sacrifices in overall savings and other luxuries (travel, clothing, etc).
Oh, I should also add- I will not be staying home until H switches jobs and gets a raise. I think we could do it now but I am not comfortable with putting little/no money into savings each month. We are looking at around a take home of *poof* or so for me to stay home.
You should also play around with tax calculators. The IRS withholding calculator is very helpful. Your overall tax liability will definitely go down with only one income.