discovery bay is in the NT but it is a privately owned/managed area. there are no village houses there.
price? completely and totally depends on the area.
can range from $20k/month upto over $100k/month.
NT is a huge area, whether or not there are "good" local, private or international schools, depends on where you are looking. we live in sai kung (not sai kung proper, but in the country park, so our rent is on the low end of the rent scale, but we are 20 minutes by car from town and the kids' school). my kids go to local schools, which we are quite happy with so far.
village houses come in at 700', 1400' or 2100'. which equates to 1 floor, 2 floors or all three floors. most village houses are 3 stories high and can either be broken down into 1, 2 or 3 flats.
purchase price would depend on: location, garden size, age of the building, convenience to public transport etc. but could range from $3M upto over $100M