Yes—Elephant farming.
Much in the same manner as cattle or pig farming. There is no great want for beef or pork, and product prices are determined primarily by market forces (interference by the government in the entire process is biasing prices upward, though).
Recall the treatment cattle rustlers received at the hands of a posse. That was because they were stealing the private property and livelihood of a citizen.
Right now, private ownership of elephants is not permitted from what I can determine. As such, there is no economic incentive to protect them. Allowing people to profit from elephant ownership, and the attendant demand for ivory products, will go a long way toward elephant preservation.
Of course, most of the world, including the US, is either ignorant of, or averse to, (or both) capitalistic market solutions.
Female elephants have a calf about every 4 to five years. It takes many years for an elephant to grow their tusks. Meanwhile they eat tons of food. The ivory would have to bring a very good price to pay back those costs.(Not that I would ever advocate killing an elephant for its tusks)