Personally, I believe that there is a big disconnect between a junior explorer like SLI and say a large mining company like Barrick. In my mind, it is like Ford who builds cars, deciding to build the tires also.
To properly develop the Tesoro will cost alot of money. That is where the big boys come in.
To put your question in the proper perspective that it deserves and for anyone to appreciate the magnitude of building a mine, pick up a copy of the following new book; Mineral Exploration and Mining Essentials by Robert Stevens. It is actually published by the Btitish Columbia Institute of Technology...
Kherson
P.S. Please keep the Ford jokes to a minimum. I have a Ford Ranger and it is a piece of junk...