Required Investment For Mini Dall Mill. Total investment requirements for equipment, facility, and land for the 6 to 10 tons per hour group range from $384,440 to $556,915. In the largest 35 to 50 tons group, investment is $1,395,850 to $1,871,380. On an annual ton capacity basis, costs for the 6 to 10 tons group are $30.80 and $26.77 per ton ...