Candidates can take a paycheck from campaign funds, even now. It just can't exceed their previous years salary, or something like that. It has some other limits also, but since he was a young lawyer, and they rules of such a thing had not been established, the fact that he didn't have income coming in and needed to pay his bills while running for office doesn't bother me at all.
The numbers in that article are all reasonable, and the total amount is reasonable. He clearly didn't use it to pay for prostitutes. How else should someone who isn't rich run for office?