1 Week of content if you somewhat focused on it, 2 if you took it easy ... after that it becomes a weekly for the Blue items and that's it.
In other words pretty much everyone who cared about it, is already done with it.

You options are, hard focus on Blue currency to get the mounts early and then ... be done.
Or take it easy and go there once a week throw some random items into workshop and be eventually done anyway.

The "content" on the island, is lame ... but they can still turn it around by giving it a purpose for those that want to decorate more, fingers crossed oof