Just wait. Trump's "self-funding" is a sham - he has just been loaning money to the campaign, and then charging the campaign for office space, airfare, etc. And if he get the nomination, or even if he doesn't, he will be seeking donations to get the "loans" paid back - even though the bulk of he money from the loans already went back to his companies.
That is what happens when you self-fund, you make a loan to the campaign. Nothing Illegal about it, check the FEC rules.
How about Hillary when she loaned her campaign about $25 Million in 2008?
How much money have you given Cruz ?