There are two conflicting responses in my head:
1) I work full time out of a combination of choice & necessity (we might be able to make ends meet if I quit, but it would be very hard, and I have a sweet work situation I would lose, leaving us in worse shape when I wanted to go back).
We currently have a nanny, but can't really afford it so need to do daycare. I felt much the same way you did. She's thriving with the nanny, but is very verbal and socially and intellectually ready for a more structured situation.
I did a ton of research on daycares centers, and found an amazing Montessori. Once we went to see it and spent some time, we realized that this was the next logical step and would soon be better for her than her current situation. My husband is now excited, and I'm still conflicted, but comfortable with our choice.
So answer 1 is - do some research and make sure you find a daycare that is going to provide your son intellectual and social opportunities he might not get with you at home. You might find that you are more than comfortable with your decision.
2) Your solution doesn't make sense to me from a financial standpoint. If you are working for more money for a new baby, what will you do once you have the new baby? If you plan to quit once the new baby comes, will all the mechanations be worth it? Can you make enough to put your son in a good daycare and still come out ahead? Are you then going to pull him out of daycare to be home with you and the new baby, away from his friends and fun activities he's come to expect or then foot the bill for an outside activity for your son? Are you going to put your new baby in daycare at 3 months? Can you then afford 2 daycare bills?
So answer 2 is - I would really look at the numbers before you create all that upheaval for your family, and think about how you are going to make ends meet once the new baby arrives, not just for now.
yep, nothing is ever easy.