JULY its x-mas state of mind?

Who ever said x-mas in July was in crude humor. So as for job stuff life has yet again been shaky. I am yet again working with my father in law building cabinets. Its a hot job...really. it doesnt make much money but its better than nothing. The biggest problem i seem to have with jobs is that I was with a temp job agency for most of my jobbing life and that seems to be a bad thing as now my list of 6 jobs are all at the longest span about 6 months. I have never had a job longer than six months. This scares the crap out of me.
This scares the crap out of me in the retrospect of me being a husband who's wife makes more than him (not that theres anything wrong with that for some couples it just bothers me a great deal as I want to be the supporting figure in my household.)

But this time something is different.

As me and my wife have been praying about it she thinks maybe this isn't what god intends for me to do at this time. I mean now more than ever its time for me to go back to school! Now Lets jump back a month when me and my wife had gone to visit my brother and sister in law up in Utah. My brother in law Greg and me had a talk about school and how I should do what I want to do for a living which is to become a teacher. The main reason I hadnt considered doing this for a while was that my wife didnt like the Idea of it because she would also have to work as teaching doesnt bring in much money. So here lies my delma

go back to school for something I have pretty much always wanted to do all my life or go to school for something (i don't know what yet) and make enough money so that my wife doesn't have to work.

So should i make my self happy or not?
I have to decide soonish I am signing up for the winter classes if i can. money is tight but thats life and almost everyone goes through it at some point, there is no reason to freak out just keep calm and move forward.