i would talk to the school about getting a job there. you do have plenty of marketable skills considering your experience nannying, with early childhood ed, and raising your own children.
one of my friends (single mom) wanted to run on the same schedule as her daughter and started working for the montessori school that she wanted her daughter to go to. she's been working there--full time, which is the school day, school year--for the past 4 years and really loves it. she's always 'off' when her kid is off, and she earns enough money to support the both of them.
i believe she works as a classroom aide or something like this and gets a great discount on tuition. it's worth considering. put together a resume of your experience that goes like this:
education (whatever your education is)
skills (what mommy/nanny skills do you have? what other kinds of skills do you have such as computing, etc?)
experience (nanny stuff, any internships in school, etc)
references (i typically use "references available upon request" but you can also list those for whom you've worked via nannying, etc).
trust me, SAHMs have lots of marketable skills. lots and lots and lots.
