Or is he just a volunteer? First off, Hoffman is getting paid as a Congressional staffer, at about $70,000 a year.
I looked through all 23 pages of the FEC report (granted it's somewhat suspect), but I don't see any expenditure by the Sali campaign to Hoffman. It's possible to sort it alphabetically, and you can see between GoDaddy and the Idaho Dept of Labor, no Hoffman.
Maybe Hoffman is getting paid as a consultant, so he might show up under another name. And, just for the heck of it, here's Sali's campaign numbers, summarized.
Sali has about $115,000, net of debt. 356 PAC contributions, 258 individual contributions.