Financiers will look at the market outlook for zinc for when the mine is due to go into production. And as far as possible, during mine production. Nothing else matters. That's going to determine your return on investment.
And financiers have sophisticated analytical processes for determining such things. AND they have specialists they engage on this. Don't pretend they will make decisions just based on the spot price today or even in 3 month's time.
It simply doesn't happen!!
Please stop trying to pretend otherwise. It's just white noise.
I asked you what YOUR outlook on zinc is. I mean, in the next few years. What is it????