I suggest donor ranks get the command /backpack (/bp) this allows them to open something like an enderchest and as you donate more you get more rows
I like the idea add it to beast and under but like 1 back pack because beast and under DONT have pv's so they could atleast get almost like another enderchest I like the idea but slot of bugs would be coming from that but it's good
Beast + Already have player vaults what are the same as backpacks just have a different name this image below shows you how much space 1 player vault has Thread Closed.