If you want to go to a school that pays you alot, Singapore isn't the place to go. Places like Dhaka will pay alot MORE as not many people want to move there.
OP doesn't sound like one who will be moving to Dhaka any time soon.
If you a moving for 3 year you need to think about more than just the upfront pay! Some of the things I'm looking at are the curriculum, if it is internationally recognised, the schools facilities, and the location of the school (how far from the cbd).
What's the deal with living near the CBD? Overhyped I must say...