If you're familiar with the game Rust, ClaimBlocks have a similar interface and mechanics as cupboards.

How it works
On the surface, ClaimBlocks allows players to protect a square radius of chunks. To pick up your ClaimBlock, simply right click it and select the remove button. If you own a ClaimBlock, you also have the ability to clear the authorization list.
Players can authorize themselves on another player's ClaimBlock by right clicking on the block and selecting the authorize button. The authorize button doubles as the indicator for whether or not a player is authorized.

Usage
Players can purchase ClaimBlocks of any tier using a simple command. Configuring a ClaimBlock is a simple as right clicking it. Players can use the same functionality to authorize themselves on another player’s ClaimBlock.

Installation
Simply drag and drop the jar file into your plugins folder.
Vault and an economy plugin are required for any economy features to function.
Requires Java 16

Configuration
ClaimBlocks is highly configurable, and includes the ability to change all text to your liking. Plugin configuration is simple and includes comments for easy interpretation.

Commands
Player
/claimblocks - claimblocks.command
/claimblocks help - claimblocks.command
/claimblocks buy help - claimblocks.command.buy - List tiers and pricing
/claimblocks buy <tier> - claimblocks.command.buy

Admin
/claimblocks reload
/claimblocks give <player> <tier>
claimblocks.admin
claimblocks.*

Developer API
The plugin has various events you can use for your plugins. I will soon have gradle and maven support.

Possible future functionality
Upgrade tier
Leave suggestions in the discussion tab or in a review.