The mills output at the moment is 50-100 tpd. It would take decades to process all the ore above ground, forget about WEM. RK stated years ago, the main objective of the mill output was 2500 tpd. When that goal is met, the 500,000 -800,000 tons of leftover ore could be processed within a year.
However, WEM is the major gem. When drilling begins and when it's completed is anyone's guess. I have no clue how long it takes to drill a mountain and the cost to discover new veins of gold and silver.