The only way to get something out of your move to HK would be to buy a property, with the housing allowance paid by the company.
But you would have to come up with the 15% deposit, at the very least.
OR you could buy a boat / company owning a flat; then there's no requirement to pay the stamp duty (yet).
Am thinking about moving to HK as well, and have exactly the same doubt as you have.
The biggest issue of course is to never go back on a base in the future.