I'd like to see plots with 'unlimited' space added to Bloxburg, here's my idea:

Please note: I will not name any cash/blockbux/robux (amounts) to leave the balancing fully up to the Bloxburg devs. I will refer to these balancing opportunities with "(cash/blockbux).
Any other balancing issues will be reffered to in the text.

To access these plots, the system would like like that of joining neighborhoods (a seperate server), which would cost (cash/blockbux) and only invited friends/guests are allowed to join the server.
Upon joining your 'infinite' plot (name TBD), the player will first start on an empty (flat) island, about X the size of a usual plot in the original game (to be balanced by devs), which the player can fully build on.
To further expand the island/plot, the owner/player will have to spend (cash/blockbux) to extend it in any direction (north, east or west, mind the spawn point)

This feature will only add bigger plots to build on. All items in build mode will cost the same, working will (still) have to be done in the main game, so no infinite cash/blockbux. Roleplay (features) will keep it's original form. Build mode will stay the same, only with a bigger space to build.

Personally, this will have a huge positive impact on my (building) experience within Bloxburg, as I love to make BIG builds, and I always end up needing more space to build.

This is all I have come to think of, and concludes my suggestion. Thank you for your time.