how about some clan hall chests for a ridiculous amount of plat say per week or something, make it actually expensive tho so that u would run out if u dont manage it well. drugs and scrolls chest would be nice and would help funnel down the plat

This already exists but its not per week, they last a month and have to be rebought.

how much

Some ridiculous amount of plat I believe.

If you go to the clan shops they should indicate the amount it costs. I do not have a clan leader at the moment so I can not see it easily./