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Quicklime costs $120 per ton. Lime is used in large quantities as a building and engineering material. The rocks and minerals from which these materials are derived, typically limestone or chalk, are composed primarily of calcium carbonate. They may be cut, crushed or pulverized and chemically altered.
Rough cost for a large certified blimp - $2 to $3 million. Although it would be hard to find one to buy right now. Operational costs $500k+ per year. Build you own, like I did. Spent $170k in the '80s.