He's not the first or only one to do this. One candidate paid himself ad placement fees through a company called Old Towne Media.
Shockingly, it appears to be legal.

is illegal (Jesse Jackson Jr. was convicted of doing that) "self-dealing" really isn't illegal.

Nor is paying your spouse or kids as campaign consultants apparently even illegal.

Embezzlement to steal funds from an organization or employer using accounting tricks to cover up the theft. This is just his campaign paying and or overpaying vendors for actual services rendered. The fact that he owns the companies is sleazy but not illegal.

..it's going to continue in his administration as he won't be divesting his business as there is no written law for him to do so. It is only an ethical "law" and we all know Don the Con is corrupt and doesn't give a damn about ethics.

two entire floors to accommodate King Con's preference to spend his time there and to sequester his current wife and latest known kid there. He will move up from funneling campaign funds from his own stupid donors, to funneling money paid in taxes by all of us, even the majority of Americans who find him grotesquely unqualified for his position.

Someone commenting on HuffPo said Trump has an ATM: American Taxpayer Money.