Ah! Suzie-Homemaker, thank you! Knew I was forgetting something!!
Right now, with driving back and forth to work I am spending about $60/week on fuel. When I have a daycare it will just be gas for around town and to go to the YMCA, so estimated at $30/week... so thats another $120 based on 4week months.

Superfun - Agreed, I need more savings. Honestly, I don't put any away right now, so anything is better than what I have right now. I will work on that and see what I can do.
Also, yes, water will increase. I compared with my mom (who has children in the day) and she only spends about $10 more a month than I do. My range was on the high side of what we have paid, so I don't think I will be too off that budget amount.

Thanks everyone for the input! I appreciate it!!
It is getting tighter as we find more things to account for...

Any other single moms out there that make this work? What is your secret