Tali,
I am happy to help you to make choices about your move to Hong Kong.
If you can be specific about what your budget is, for each item of concern, we can possibly tell you what you can achieve, at that price point.
Location: Midlevels. A 700 sq ft apartment on/ around Caine Road will start at $20,000 HKD per month. I have a friend that lives in 970 sq ft on Robinson road in an OK apartment block, and pays $60,000 per month rental. Describe your ideas on age of building, proximity to escalator, price point, size requirement, and we may be able to direct you.
Other areas of Hong Kong island can be much cheaper, which is why Hong Kong island has a huge spread of people. I live in Aberdeen, a very 'local' area. If you are happy to pay for Central area, then that is fabulous. If you wish to find a more affordable area, then if you state your preferences for the areas' facilities, then the forum members may come up with suggestions.
As for cost of living, I believe that for a similar standard of living in Hong Kong compared to suburban US city living, your budget should double here in Hong Kong. Rents compared to New York City / commuting suburbs, are roughly comparable.
I support an idea of living in a serviced apartment for an indefinate amount of time, until you find exactly what meets your 'adjusted' expectations. Everything is an adjustment and you don't know how much so, until you get here! Serviced apartments book up really early, so, you may want to start by reviewing which ones will have vacancies in the near future. Utilities and Cable will be included, so no worries there.
Cable: seems expensive to me. We have PCCW. The companies are restrictive on the channels chosen. Each channel costs a significant amount to me. Also they require the customer to sign a binding contract for one year, in order to take a subscription of the channels chosen.
If you are Jewish, then I recommend contacting the JCC on Robinson Road. You may get lots of assistance from them.
Good luck and let us know what specifically, you wish to know!