Hello,
The current thinking is to have a single “Owner” of the beacon who is initially the person who placed it. The Owner can break, place and interact with anything in the beacon, as well as being able to add and remove plots and change the permissions on the beacon. There are two other roles people can be given: “Builder” and “Worker”. Someone can be one, or the other, or both of those things. Builders can place and break non-interactive blocks and props, but not interact with anything. Workers can interact with things, and place and break interactive objects, but not place or break anything else. We may decide to allow both workers and builders to interact with doors.
That should give you most of what you need, and then when Guilds come along there will be more control with that system for collaboration (for example allowing more than one person to add and remove plots).