just save up your stems and use those along with bud. Stems still have thc in them so you can cook it out. I have made butter with trim(leaves), stems, and no buds at all and the brownies that were the end product were awesome. So use stems, it will provide you with pretty much free thc, cause you prob throw them out anyways. you just need a bigger ratio of stems to butter than you would if you used straight buds