1.i m poor enough,so i didn't prepare red envelope for you.
2.i m so poor that i didn't plan red envelope for you.
备注：
红包用red envelop或者red packet.前者用得多一些.基本上没有其它用法.
prepare 和plan分别是准备和计划的意思,而give是简单的“给”的动作.在这里,分明是给不了,而不是不给你.
以上两句均可.