Well I guess it keeps the bailiffs from the door. Presumably the $20k currently going to the marina club in mooring/service charges will go a long way towards a small flat in Tung Chung until they shift the boat.
Back in the day when junks were around 1-2m, buying and paying off a junk was seen as a way of syphoning the owner occupier allowance, and then selling the junk as soon as it was paid for (and of course buying another from a fellow pilot). There was a running gag about how many times the CX allowance had paid for certain of the older junks.