Still I'm confused.

You're betting that i can't handle working at a public school/uni, yes?

You're assuming that now i work at a TC teaching 20+ hours a week and generally "breaking my back" as you've put it? (These are your assumptions by the way)

Yet by your own admission working at a public school/uni is an easier job. So effectively you're betting that i can't do an easier job than the one that you assume i already do?