M.O.
I have the same problem as you- we live in the city too! There is no way my son will be ready at 3 for 5 day preschool! I think that is a lot to throw on a kid all at once.
Wright College has a wonderful early childhood program and the instructor has been working there for 25 years! She has a preschool program. It is very affordable...
I don't know where you live but a few of the other Chicago City Colleges have early childhood programs-
I am planning on doing St. Robert Bellarmine 2 days a week for 2 1/2 hours and Wright 1 day a week for 1 hour.