NZ post site would be cost prohibitive compared to council park land
Incidentally NZ Post are also soon to be vacating another site further down the esplanade (little known as it is not NZ Post branded). It is a larger site and is for sale - corner of victoria st and the esplanade, with the 2 story black building and a taller green building in the carpark.
It was actually owned by Terry and is now run by the bank that took it off him.
Obviously not really viable either but worth mentioning nonetheless