Wow i statying at christian at saigon too. They have motorbike tour service? Cool
if you kiasu a bit, then u buy beforehand on klook or other online tour websites. otherwise, just go there, there are many tour package shops, especially along pham ngu lao area.
typical tours will include cu chi tunnel and mekong delta. for things to do within the city, suggest u can search online for a half day motorbike tour. last time i went to hanoi i booked with christinas.vn and the motorbike tours were conducted by students so it was a fresh experience. it's a donation based service, so give them a tip that you think is reasonable. website as follow:
https://www.christinas.vn/saigon/experience/student-city-tour/
also, if you like museums, do give war remnants museum a try. to me it was quite interesting and heartbreaking when u see pictures of the victims from agent orange.
for money wise, for 5 days i think u can bring around $200 in VND but bring extra SGD just in case. besides, the money changers here offer quite competitive rates compared to singapore. u can find them near Ben Thanh market.
