yeah, as long as there are trichs on the leaves, you can make hash out of them.
i'm not sure how long you can keep shake and popcorn in the freezer, i'd say at least 6 months, maybe as long as a year if you have it in a well sealed container. i get about a gallon jug of good trim and popcorn a month, from trimming 3 plants, usually, one every ten days or so.
that will usually make me 3 or 4 good sized chunks that add up to about half an oz, which is about what it takes me to get to next month.
i make dry ice hash, but i'm sure the yield would be close to the same from bubble hash, just sorted into different grades. i have 3 grades of screen, but i've just been using the 110 for a long time. i like what it produces, it might not be as "pure" as it could possibly be, but it already makes me wander around in my small house, trying to remember why i got up to begin with.
also, i try not to let the stuff in the freezer thaw out at any time, it turns into a mushy lump of shit if you do