I'm still waiting for proof he actually self-funded his primary campaign like he claimed.
His FEC filings show he only loaned (key) a percentage to his campaign, the rest of it came from donors like any other candidate. Loan is a key word here because those loans have to be paid back to Trump, from donors or he'll run afoul of campaign finance laws. It can be paid back with interest to. So he isn't really self-funding, he is using his campaign as an investment vehicle.
But that's not all. Because he refused to release personal financial documents, we really don't know where that money came from. Joe Schmoe could have been giving him personal donations far in excess of campaign finance limits and then Trump turns around and 'loans' that money to his campaign. Just like the Charlie Trie issue w/ China donating to Bill Clinton, the self-financing ruse could just be a way to get around donor disclosure laws.
Oh, and if you want even more interesting revelations, check out his FEC filings.. did you know Trump pays himself a salary from his own campaign?