Here's my view, but admittedly I am VERY biased because I have NEVER attached any self worth to my job ever...not even a little bit.
1) Flat out move. Make your wife happy. A REAL MAN supports his family any way he can, and in this case, you have the opportunity to support her in doing something she really wants.
2) Your kid is 6. 6 year old kids make friends instantly. He will be more than fine.
3) Admittedly, I am also biased against private education. It does vary greatly depending on the state you are in, but in SOME religious schools, there is a certain percentage of students there that were cast offs from the local public school. I went to two very different public high schools, both for 2 years because my father got a promotion and we moved. The first one was ranked as one of the worst schools in the state. The second one was ranked as one of the best in the state. I didn't want to move, because friends in high school are a different deal than friends at age 6, BUT, the end result was this...at the bad school, the best students went to college and were successful...this was a smaller percentage than the good school. At the good school, the best students went to college and were successful. The schools just happened to be in different economic areas. The bad one had lots of working class people who didn't go to college and who didn't value education. The good one did. My parents told me from as young as I could remember that I was going to college. They were both college educated (Dad with a Ph.D., and Mom was a teacher and then later an RN (with a bachelor's degree). Point is that success starts and is crafted at home. Also...an all boys' school. Barf. Being able to socialize with the ladies is a valuable skill to pick up while in school.
4) You could also do the move halfway thing (well, if there's a town there)...or even move closer to her job. I know a guy who drove 90 miles each way to work for 30 years. TONS of people take an hour each way to work and then home. Big deal.
5) If it really comes down to staying where you are or moving all the way to the new town, I'd choose the new town if I were you. And, so, work remotely. So what if they let you go later. If you quit immediately, how is that not worse? She's going to be making $170,000 a year, and it's cheaper to live there, AND you won't be paying for private school. Damn. I'd do that in a heartbeat.