Keg,
At three to four days a trip means decent time off at home.
Don't forget, there's also going to be 9 day 'shuttles' SIN/LHR/BKK/LHR/SIN and SIN/LHR/HKG/LHR/SIN. Probably means even more time off, at 'home' or on the golf courses on Bintan Island.
TL