I have regular expenses in Thailand, where I spend several months a year, and I tend to exchange to THB more when I see good rates and less when I see poor ones. So, I'm not worried about periods of 2-3 months with less favourable rates. It's a different story if the "less favourable" rates keep on going for much longer. Even though I'm comfortable enough, financially speaking, and not usually stressed, I would join the crowd reducing time spent in Thailand and looking for options elsewhere. My wife who is Thai is very cool about spending several months outside Thailand, she is a good traveler!