Worlda Journal: Can You Make a Real Career out of TEFL

my answer is:"of courese, if you want to". There are numerous opportunities for long-term or permanent positions, or for advancement to Director of Studies or administrative positions. Other possibilities are teacher training and materials writing. A real career in TEFL almost always requires at least a heavy-weight TEFL certificate (for example Cambridge ELT or Trinity) and for more senior positions a TEFL diploma or degree or similar.
so the conclusion of Guangzhou Worlda Journal is: you can make a real career out of TEFL. Just do it.