I'm just going to be the devil's advocate here and present a few things to think about since I don't know your whole situation.
1.) How much do you make part-time that you can afford to pay a sitter? How much per hour do you make compared to how much you will have to pay the sitter and then take your part and subtract taxes and fees.
2.) How much do you spend to work? Food costs, clothing costs, gas to work? Food for little man?
3.) Who can better care for your little man outside of you or family?
I'm sure there is something I'm forgetting, but at any rate, my hubby and I decided that I would stay home with ours. I actually watch two for my neighbor behind us since she got to know me fairly well before asking. I worked at night part-time and got laid-off.
Can you not work at night part-time after you husband gets home?
There are always ways to cut costs...are you living at the bare minimum. My hubby and I scrape by, but it's worth it for me to stay home with the kids.
We shop Aldi, Costco (for a few things), and Woodman's...then Wal-mart for incidentals.
We leave lights off during the day.
We open windows in spring, keep thermostat at reasonable temps and just dress appropriately.
We don't eat out.
We rent movies from redbox for $1.
We don't have cable or satelitte...that's about $60 or more a month alone. And then we don't have all that garbage coming into the house rotting our brains and those of our kids. Boy the things we get accomplished since we aren't sitting in front of the toob for an hour or two everyday.
We don't have cell phones...actually we didn't until my mom put me on her plan for $10 a month.
We have the cheapest land line service available.
We don't spend huge amounts on birthdays and Christmas. We spend what we are able to save. And we get very creative. The girls don't ask for much because we don't have tv to influence them...they appreciate what they get and get excited about the tiniest things.
We buy clothing staples that can be mix matched and we only buy on sale or clearance at outlet stores or places like Kohls, Sears,.....
We don't spend money of activities, but find creative things to do with the girls like fishing (no need to buy a license if the we don't fish...the girls don't need one), the library has lots of activities, Woodstock theatre has great matinee prices, there are tons of things if you research it.
That's just a few things we do to get by so I don't have to work. When there is a will there is a way. Believe me it can be done. I think your son would be better off with your care and supervision...he will be your first priority and he won't be at a sitters because they have other children and responsibilities. That's not disparaging them, but telling the truth.