Holy sh*t that's the most kief I've ever seen I'm struggling to fill my grinder at home....let alone save that much.Did you mention your friend's garden and deep freeze and cure idea?
As for me, I have found that they lose the spongey texture when frozen.
Temps are important between deep freeze and freeze as mentioned, certain temps degrade the THC very quickly, others it acts as a preservative.
I only freeze my buds for kief collection purposes and then for making freezer hash.
I don't have a air oven to make crumble or a flat iron pancake maker to make shatter or I would try those options out.
I tried fridge curing and did not like it. It did seem like the trichs fell off easy.
But here's what I do with my frozen stuff