I think you are sensible.
Where else, apart from China, can you do a 'fulltime' job for a fulltime pay much higher than your Chinese colleagues while teaching just 12 hours a week and living in rent-free accommodation?
My country is short of maths teachers, and I'm fully qualified to teach it. I've never considered returning there to teach. Disciplinary problems, no rent-free accommodation, and a low standard of living while working much harder and longer than I have to here in China have caused me to stay put in this vast country for 18 years. I'd have to be a bloody fool to return to my homeland to impoverish myself. If you can teach a bit, China beats the west by miles. And you can live well without becoming a grovelling weasel. As a foreigner here, you get much respect, earned or not, the point is that you get it. So different from the West!
And beautiful Chinese women are to be had. That's a big plus too, as is the food.
I know there are negatives here, but they are far outweighed by the positives, and unlike most Chinese people and some idiotic westerners who post on here who state people have a duty to remain loyal to their homelands, I feel I have no obligation whatsoever to remain loyal to my homeland, and certainly do not. It doesn't offer me what China does, nowhere near it. End of story!