Firstly, I didn't know you are a teacher! How cool. I love and respect teachers a lot as I can imagine the weight their calling comes with. Teaching is not something you take on, it is something you ought to love to even attempt.
A decade of balancing everything should be enough especially if it's draining your health. I feel like you gave it your best and for that you deserve the rest.
Finances are always that determining factor most of time but when it comes to health, the scale changes. I believe that other doors of earning will open up for you. I am not trying to patronise you but you have a huge advantage here if not anywhere else.
May light always stay with you :)