And here is another article, New York Times, more specific: "Donald Trump’s Self-Funding Includes Payments to Family and His Companies"

"According to documents submitted to the Federal Election Commission, Mr. Trump, whose campaign has just $1.3 million cash on hand, paid at least $1.1 million to his businesses and family members in May for expenses associated with events and travel costs.

The spending raised eyebrows among campaign finance experts and some of Mr. Trump’s critics who have questioned whether the presumptive Republican nominee, who points to his business acumen as a case for his candidacy, is trying to do what he has suggested he would in 2000 when he mulled making an independent run: “It’s very possible that I could be the first presidential candidate to run and make money on it.

In May, the biggest-ticket item was Mr. Trump’s use of the Mar-a-Lago Club, his Florida resort, which was paid $423,000. The campaign paid $350,000 to TAG Air for his private airplanes, $125,000 to Trump Restaurants and more than $170,000 to Trump Tower, the Manhattan skyscraper that houses the campaign’s headquarters.

And Mr. Trump, who has said he will not take a salary if he is elected president, paid himself $3,085 in May.

[....] Mr. Trump did not appear to be violating any campaign finance laws, but that he could face more scrutiny over the use of his businesses for campaign purposes now that he is more explicitly asking supporters to donate money to the campaign. "