DHT is not the only factor in hair loss. Even with lower values, your body could raise follicles sensitivity to androgens, which means extensive hair loss (not sure about this).
I think It's pointless to purchase this huge quantity, especially if you'll end up using only quarter of the dose at once (.25 perhaps due to side effects).
To be honest, I don't see any advantage this forum can give except for hair transplant consultations, They're focusing more on hair transplant as it's their number one source of income!
Yes, the way this drug affects you hormonal profile is unexpected. Even if you find people that retired the drug and then restored their original hormonal balance after long-term usage, that would not help you. Unfortunately, You need to experience this yourself to see what would happen!