Seretide works for me, around 700 baht for 60 doses 50/250 diskus. Also contains a steroid, so I always rinse mouth and throat immediately after use. Running HEPA air cleaners all the time in my condo helps a lot too, so now I only need one puff of Seretide daily.
That is very nearly correct. The first year I extended visa for reason of retirement (previously was for reason of marriage) the IO required my wife to be there to sign documents.