Hi,
regarding to the claim transfer this is impossible because this is D34DPlayer's island, but you can still copy it by using schematica mod and create a template using that mod and building by yourself the entire build on your own island. I will ask the manager if the staff could help in this project by building the structure.
Regarding to the player hub project you can make it and you can run everything you want on it like have events, giveaway, but everything needs to be made without any creative influenced items.
The shop system already exist with /market and i don't see the point to make it because people can't interact with your claim unless trusted.
In my opinion this would be a great idea too so people don't focus only on progress on the modpack but have fun with events like parkour events, or labirinth and such more. You can select guys to make like a "staff team" managing the entire structure and events.
MiniTerm mentioned a template to fill, but there isn't one. I appreciate if you reply to all my questions so we can figure out your intentions.
Which events will you make on the server?
How often will you make events?
How would you manage the shop section on the island (if you want do one)?
Sorry for late reply
EDIT:
Hello again,
I spoke to the manager and he said staff can't help you building the base so the only way you have to build the "player hub" is building it by yourself or with your mates. Have fun.
PO3 MOD iim_wolf