In case you haven't been paying attention, HKG Govt now require 25% down on all properties < HKD6 million, 50% on properties over HKD6 million. It's meant to curb speculation by mainlanders. All it's done is shut locals out of the market entirely.
ID90 (zone fare) HKG-TPE HKD564 return (economy). Flights always full, many commuting cabin crew. You'll be lucky to get on. I would suggest that unless you want to plan on coming back a few days ahead of your rostered (scheduled) flight, you'll need a full fare ticket - USD200 each way.
IF you can find a 1400 sq ft place for HKD6.3 million, rentals will be north of HKD23K per month exclusive of taxes and "management fees".
You are taxed on income, discretionary bonus, other bonuses, education allowance and rental assistance. 15% is the cap on salary, but my tax bill frequently exceeds 20% of gross income. It may only take 20 minutes to complete a tax return, but by G*d, they get their money.
If you're a US citizen, remember that you have to file for Uncle Sam as well, and he'll want his share after USD70 or USD80K (or thereabouts) too.
NO taxation agreements between HKG and Canada at present, the guys and girls are being taxed by both countries on their after tax income. Punitive right now. It's under appeal, but pay first, debate later.