Donald Trump’s golf habit has already cost taxpayers at least $102 million in extra travel and security expenses, and next month will achieve a new milestone: a seven-figure presidential visit to another country so he can play at his own course.

U.S. taxpayers have spent $81 million for the president’s two dozen trips to Florida, according to a HuffPost analysis. They spent $17 million for his 15 trips to New Jersey, another $1 million so he could visit his resort in Los Angeles and at least $3 million for his two days in Scotland last summer ― $1.3 million of which went just for rental cars for the massive entourage that accompanies a president abroad.

And, notwithstanding Trump’s campaign promise that if elected he would not play golf at all, the White House has done preliminary work for Trump’s visit to his resort on the west coast of Ireland next month, according to Irish media and government sources, even though no official meeting with Irish leaders is planned in the capital, Dublin.

Late Tuesday afternoon, the White House announced that Trump would meet with Irish Prime Minister Leo Varadkar in Shannon, just 30 miles by air from Trump’s golf resort in Doonbeg. It will be the first time Trump will visit a foreign country — with the staggering footprint of personnel and equipment that entails — for the main purpose of playing golf, though an official purpose was layered on after the fact.

“It’s obviously an incredible waste of money,” said Robert Weissman, president of the group Public Citizen. He then quipped: “Of course, the more time he spends golfing, the less time he spends governing, the better.”

The $102 million total to date spent on Trump’s presidential golfing represents 255 times the annual presidential salary he volunteered not to take. It is more than three times the cost of special counsel Robert Mueller’s investigation that Trump continually complains about. It would fund for six years the Special Olympics program that Trump’s proposed budget had originally cut to save money.

While Republicans and Trump himself frequently criticized former President Barack Obama for his golf outings, Trump has spent more than twice as many days on the links, to date, as Obama did at the same point in his first term. And because Trump has insisted on dozens of trips to New Jersey and Florida to play at his resorts there, taxpayers are spending more than three times as much as they did for golf by the same point in Obama’s term.

The White House did not respond to numerous queries regarding this story. North Carolina Republican congressman Mark Meadows, a close Trump ally, dismissed the $102 million figure as insignificant.

“There’s a lot more important things to worry about than the rounding errors that we sometimes have on these things,” he said Tuesday.

Just as troubling as the amount Trump has spent so far on golf trips is the fact that his visits have been to his own properties — for-profit businesses that put money in his own pocket and that Trump routinely praises during his visits.

During his trip to Scotland last year, for example, Trump wrote: “I have arrived in Scotland and will be at Trump Turnberry for two days of meetings, calls and hopefully, some golf - my primary form of exercise! The weather is beautiful, and this place is incredible!”

“His top priority with these trips is not the business of the American people, it’s the business of the Trump Organization,” said Jordan Libowitz of the Citizens for Responsibility and Ethics in Washington. “The American presidency has become another tool to advertise his golf properties.”

The vast majority of Trump’s golf costs result from his insistence on playing at his Florida courses in West Palm Beach and Jupiter, where he has spent 61 days while staying at his resort in the nearby town of Palm Beach. A weekend trip to Mar-a-Lago averages $3.4 million, with most of that resulting from the hundreds of thousands of dollars it costs each hour to fly both the modified Boeing 747 that serves as the primary Air Force One, as well as the C-17 cargo planes required to move all the support vehicles in Trump’s motorcade.

Determining the cost of Trump’s golf visits is not easy. The White House is not subject to the Freedom of Information Act, and Trump’s press office does not answer most questions about his golf visits — even refusing to confirm whether he is, in fact, playing golf when he is physically at his golf courses.

But a recent Government Accountability Office report regarding Trump’s four early 2017 visits to Mar-a-Lago has provided hard data and a methodology that HuffPost followed in its own analysis.

The HuffPost analysis took a conservative approach to determining costs. For example, it used a per-hour rate of $15,994 for Trump’s use of the smaller Air Force One that he takes to Bedminster, New Jersey, even though that figure accounts only for fuel and maintenance, not the additional factors that GAO used when it determined the $273,000-per-hour cost of operating the larger plane.