Nothing ages you more than not being able to provide for your family and not saving for retirement! I've been doing the Tokyo drifts for 6 years now, dealing with jetlag is something that you will get a handle on after you do it enough times, is not like you will go back and forth from one time zone to another, you just need to adjust twice a month. I'll take this any day over being at the bottom of some seniority list making nothing! Getting my salary to fly 55 hours a month and dealing with time zone adjustments twice a month is not that bad, specially when commuting confirmed business class every month