My late Mother did the same thing. We didn't do homeschooling, but she did it all and did it exceptionally well. She was brilliant but never acted like it. She was a taxi to more than the 6 kids in our family. She taught piano, voice, directed the church choir, wrote plays (we were in them), was busy in RNC fund-raising, and on and on.
We just called her "Mother."
So good luck to you. It really warms my heart to hear stories like yours. As for the MT thing, it sounds like you could teach yourself. That's what I did.