South32 is a more likely candidate for a partner, but again, not until after someone else has done at least some initial drilling.  South32 from Australia is the party who took out Arizona Mining at Hermosa west of Rosemont, and they bought it from the same group of investors who sold Rosemont to Hudbay.

https://www.south32.net/

I'm not sure what the folks initially behind Rosemont and Hermosa are doing with their money, but they could be interested also, but after someone else pays for the first round of drilling.

As the say, time will tell.