Physical item costs for server commands

I've tried things like booscooldowns but I'm looking for something a little different.

I'm looking for a simple plugin w/config file that allows you to attach a item cost (any item id)to available commands in server.

So example:
player (global setting, this applies to OP as well) tries command
/home 3
or
/spawn
/warp town
/back

All those commands will subtract the amount listed in the config. If player does not have the necessary item or amount they are prompt with a message saying so.

I'm thinking something like -3 slimeballs for most commands.

Would that be cool? I think its good to offset the cheapness of /back but I don't want to remove it all together. Seeking this for a 1.3 bukkit, wanted to put this out early though. Thanks.

 

Would you want it as;
One item/amount per command

or

One item/amount for all commands in the config?

 

Per command.

 

Any progress on this idea. I can help test and troubleshoot.