The machine's present cost is £400 and the rate of interest is 10 per cent.
At present costs, many of the older mines are already closing down.
Union workers have 30 days to better the offer, which park officials say is $120,000 cheaper than the present cost.
The Japanese, he said, should be able to buy a home at "about two-thirds the present average cost."
The net present cost to Government over the same period of building and operating the line would be £24-26 billion.
It does make a financial contribution towards the present running costs.
Total out-of-pocket expenses will be less than present costs for 95 percent of the population.
Both men said the present cost of tungsten pellets was too high.
"Renewable energy" with storage is 10 times the present cost of fossil fuel.
The price of a duck stamp has increased from $1 to the present cost of $15.