An exemption is relevant on a daily/weekly by it's very nature i.e. not long-term to the people wanting one. So, pull up your size 48 knickers and fook off whilst you're doing it! Oh and
Take a salary. I knew two American female teachers who were hoodwinked about "helping poor little Thai kids learn" English. I asked them how they felt when they were greeting the kids stepping out of their parents Mercedes Benz, BMW, and other luxury cars!