Housing is not expensive - it is OVER THE TOP EXTORTIONATE!
You give no indication of who your job interview is with, but don't do it if you don't have a decent expat housing allowance.
Go online to some HK real estate agents. The quoted square footage is always gross, not net, so you don't actually get that area. (the footprint of common areas & lift wells is divided up between the apartments on the floor, and added to come to a gross floor area). Then once you've worked out what size you like, have a look at the price.
Utilities (ie power etc) are not cheap.
If you want to eat true local food everyday (except for inflight meals), restaurants can be very cheap. If you want to get western food on a regular basis, then ker-ching!
Convenient housing to airport = Tung Chung, but you're 40 mins by train to city, and the train stops about half past midnight. Taxis that late will cost in excess of HK$300 from the city to Tung Chung.
In international surveys of cost of living for expats in major cities around the world, HK is ALWAYS in the top 5, and 96% of the time in the top 3. This town is more expensive than New York & London according to these surveys. The only places that normally top HK are Tokyo, Osaka, and ,lately, Moscow (each business magazine publishes slightly different results, but it's always the same places in the top 10, and HK is always top 5)
Lifestyle can be great, but you need a decent income to sustain it. A big part of that is a housing allowance. Unlike many places "back home", you can't look at things as a whole here - you need to ensure an appropriate income without housing, and you then need to add a suitable housing allowance on the top. Whether they package it for tax purposes as a separate allowance, or a total package is semantics, the important thing is to make sure that each pay packet you get both.
Come & look by all means, but do it with your eyes open, and investigate the true facts.