dear debbie,
just wanted to share my experience. i found out that i was moving to singapore in the new year about 6 months ago. like you, all the different thoughts ran through my mind about the logistics. i took the advice of a singaporean friend who advised me to locate an
International School first. after that, the location where you live automatically resolves itself or at least narrow down the choices.
there are pros and cons of each international school and you should do a little research. the thing that is more important, at least when i was researching was the availability of places at the schools. you even have to put a deposit to stay on the waiting list for a couple of them. however, i heard that there are places freeing up due to the economic downturn.
is your budget in sgd or usd? if the former, i think you will find that it does not stretch very far in terms of getting great locations near town. try the forum on the rentals, you will be able to get a better idea about what is reasonable.