Being a history teacher is such a cool job. Like, you can control how your students think by using history as an example. You can make them into racists.
My 11th grade AP U.S. History teacher used to throw all sorts of right-wing bullshit at us, like how Booker T. Washington had better plans for blacks than DuBois, and how affirmative action is unjustified in all cases. All of the students would take glances in my direction (I was the only black kid in class). I shoul've just claimed "that's racist" at one of the many things he said that weren't PC then threaten to talk with the school administration, just to punk him.
My 12th grade AP English teacher once told the entire class that MLK was a philanderer and a Communist and a lot of the students looked at me again, then back at him with these somewhat appalled facial expressions. Not me though...I learned "The Truth About MLK" months earlier...
"End the hate, separate!
But responding to the OP, just follow your passion. There are consequences to making money the primary ends that justify the means. I plan to be very rich, but I'll be training for my practice until I'm 35 at the earliest. Would you want half of your life gone just for a few extra hundreds of thousands of income each year?