Perhaps integrate Cray tokens
http://www.minecraftforum.net/topic/1973684-forge-162-cray-tokens-a-simple-currency-for-your-server-api-included/

Also, perhaps API for [FORGE][1.6.4] FurnitureAPI - Download - Tutorial - Make your items cook-able and freeze-able with my mod. Also add custom items to the MineBay shop! NOTE: v3.2 and above.