Take the chance or not?

So this week I was informed of a new job opening up at H Guy Child Elementary School. Some of you know that I have been trying to get hired as a teacher anywhere, but mainly there for a few reasons, 1-it is 2 mins from my house and 2- Leslee, Ryan, and Sylvia (MIL) all work there so I figured I would have a better chance there. Well unfortunately the district wouldn't let the principal hire me because of my lack of experience as well as the fact that I don't have my teaching license. I graduated in Early Childhood with a concentration on Education, so I did most of the classes to get the license, but not all of them. Anyway..Leslee (sis in law) told me about a job opening up in January for a PE specialist. This person would teach PE for 30 mins per class. This person does not have to have a license to teach. So here lies my issues-
Pros-
-Helps me get my foot in the door with the school and district
-Gives me more experience
-Would be a more fulfilling job
-I wouldn't have to work Sunday's anymore and miss church
-I would prob enjoy it.

Cons-
-It only lasts from Jan until the end of the school year.
-After it ends, I have NO job.
-We can't afford for me not to work.

So there are my issues..Do I take the chance with this job and hope it helps me finally get into the job I want (Teach), or do I play it safe and continue working somewhere I dont like? The job I have now is a job..and it pays money..and I have been there almost 5 years. Is it worth giving up for something that could be something good?? Or maybe it will be terrible?
I have been talking to a few people about it and almost everyone has told me to take the risk and do it. So I have talked to my old work (Ogden Pizzeria) and asked them if I could maybe come back one night a week there, and they seemed like they could prob do that. Of course that isn't a sure thing yet.. But if they did hire me back then I could work there during the summer more hours and if I really had to, I could just depend on that for money.
What I really want to happen is this.. I take the job, love it, do awesome at it and the principal wants to continue this job, so I take a few months off during the summer, and then start again in August.. OR I do a great job and a Kindergarten job or 1st grade job becomes available and the principal likes what I did, so he hires me!
So what do you think? Do I apply for this job and hope to get it? Or do I play it safe to make sure I can pay for things?