I've seen guys make shatter by crunching buds in parchment, in between a hair straightener or something similar.
Its too much "work" for me, honestly looks like a pain. But the buds are still smokable afterward too.
I can get fresh trim free & butane for free ..Making your own oil is not going to be any cheaper unless you have trim to run. It's not likely to find a strain that yields enough to equal its price in bud form.