I don't know what grade your school goes up to, but can you ask other teachers for suggestions on students or siblings of students that might be responsible and would want to earn a little extra money after school? Teenagers always want their own money and simple jobs around your house should be easy for them to do and shouldn't cost you too much! My aunt uses a teenage girl that's home schooled to come run errands with her to help with her kids. The teenager makes a few extra bucks doing really simple stuff and my aunt gets things done in half the time and her kids are happier when they don't have to be drug all around the stores running errands! (The girl usually goes with them to the stores and stays in the car with the kids! My niece is very clingy and won't let mommy out of her sight for very long!)
When I was in high school I got several jobs through my mom's friend's at the school she worked at. I did a lot of house and pet sitting. Everybody at the school knew my mom had older kids so they were always asking my mom if my brother or I could help them with stuff! Because my mom worked with them and knew them, she wasn't worried about who's houses we were going to. Hope this helps and congrats on the new addition!
A little about me: I'm a SAHM of a very bright 2 1/2 yr. old boy who is the light of my life. I have been married to my wonderful husband for almost 6yrs. and we are expecting our second son in 3 mos. I used to teach kinder. but decided to stay home until both kids are in school. I tutor to help our income.