As far as making Flight Instruction a living. Its really hard to do it economically
unless you get yourself into an abnitio program were you train cadets for a airline.
Ive been a flightinstructor at another flightschool than the one Im currently working at now, and I were barely able to survive. Then I got a job training cadets for an airline, and the pay increased to a quite acceptable level, plus my workday changed from 7 days a week at any time during a days 24 hours, to a normal 5 days a week from 0800 to 1700 kinda job.
At my first job I were close to getting mentally and physically burnt out because I worked long hours with little in return moneywise. Idelogy gets you only so far. Everyone have to be able to afford food.
Then I got into the ab nitio training program, and here we have instructors with thousands of hours and a wealth of knowledge that would get a job in an airline with little problem, but enjoys instructing so much that they dont even consider quitting instructing. Some have even been flying in the airline, grown tired from it and returned to their roots, flight instructing.
Bottom line. Living ONLY from flight instructing is usually quite hard, unless you get yourself into a solid company with an cadet training program. Here you will get ALOT of pressure from your bosses, but in return you get a fairly normal life and a pretty good pay.
PS: Im working in USA (Norwegian citizen, but still quite happy with were I am right now.)