I believe it was pointed out in a previous post that the $500,000+ bond should be refunded once the reclamation work is completed. This should provide plenty of funds to complete the mill startup.
The March 1 deadline for the payment on the new mines might be just a milestone placed by the seller to insure that progress is being made toward opening the mill. Since he also is getting millions of shares of stock, he has a vested interest in making sure that the company is successful. I wouldn't be surprised if the deadline is moved up again to perhaps July. This way the seller can back out at various points if he feels that satisfactory progress hasn't been made on the plan.