Still the best keep secret
I bought a boat 2 years ago, my second and unquestionably it's the best life style in HKG for a family. The boat is more private than an apartment, with more space, better heating and cooling and better insulation. To date no one has ever used a jack hammer on a boat or have we had screaming children or dogs running on the roof above me, as you experience with apartment living. I can play my music at a reasonable level without complaints due the great noise attenuating properties of a boat.
Yes the monthly costs are higher, 20000pm is closer to the mark however, it's a small price to pay for a superior lifestyle. 3000 sqft of luxury living for a fraction of the price of an apartment. No stamp duty! no HKMC and only 5-10 % deposit required, it's a no brainer.