piggy,
if im called up for a interview, i will go and find out abt the job duties & remuneration package. Since u emailed them ur resume, i think u got a good opinion of the job right? things may not be as complicated as we think. if u are worried abt traveling, perhaps they have company bus for staff to shuttle them to resorts world from some MRT stations, vice versa. if u dont find out, how wld u know?
plan ur leaves, arranged all interviews in 1 day or take leave for interview while u hv other errands to run in the same day, like that wont feel the pinch of taking leave for just 1 interview.
It's good to go & find out if u are keen. from there u know if u like ur new work aspects and decision will be easier made. One might not be selected for the job so if u dun like, u also hv nothing to lose.