I have always told new instructors not to rely on instructors wage to survive. Have a good job in the week and instruct weekends.
I have my own school, just me and my receptionist/business partner. She takes next to nothing and i take less than minimum wage.
There is no money in flight training, just do it for the love of it. For me i am my own boss for now. But you won't be in a position to rent, never mind buy a home or support family. I'm single, live my own, in my owned studio flat and could survive on the dole tomorrow and not be much worse off.