Looking for a plugin that works similar to the ruler tax box system, except with the following changes. 

each player (solo) or clan (group) can set a box in their base to automatically gather a set percentage (0 - 100%) of the loot they gather out in the world.
Please include a feature for marking the box on the map if they go over a certain percentage. (server owners can customize their own threshold)
Also can have an option to make the loot that gathers in the box to either be subtracted from the total loot gathered Or over & above the loot collected

Some extra ideas:
A clever scaling system with the percentages. Since there can be 5 in a group. For every extra person in a group, minus the percentage of the gather by 20%
Example: a solo player will have 100% of his collected loot gathered in a BOX. for every person in a players group, minus the percentage gathered by 20%. If there is a full group then can set it a minimum of 20%.