Being an e-educator is very tough, even if we are fortunately given a position where we can devote our energies solely to the e-education.
There are many things to do : to learn/master, to check, to prepare and to manage.
Money aside, personal time and physical strength are the definitive costraints on e-educator's performance, because they are physically limited.
Indeed, being a "true" e-educator would exceed the capacity of a single person,.