you shouldn't have any trouble finding something suitable within your price range for kowloon tong.
however, if you are interested in living in clearwater bay or sai kung, then i would STRONGLY suggest you look at SAI KUNG LOK YUK KINDERGARTEN. it is a local kindergarten that teaches in cantonese, but they have a lot of expat kids from all over the place. both of my kids have attended this kindergarten and LOVED it!
my daughter, although 1/2 chinese, didn't speak more than a few words of cantonese when she started. she is now finishing K2 (she's 5) and fluent in cantonese. my son, who also attended this kindergarten now studies in the chinese stream of a local school in sai kung.
expats live pretty much everywhere, just in different concentrations.
kowloon tong would have quite a few expats, but sai kung, i think would have more.