From an email solicitation sent to supporters.
Every small business?
Here's a report from the 10/15/2015 Wall Street Journal (Scott Walker’s Heavy Spending Lands Campaign in Red)
The biggest driver of Mr. Walker’s campaign debt was staff salaries, which cost his campaign nearly $2 million. Communications director Kirsten Kukowski, campaign manager Rick Wiley and lead advance man Matt Hall each made an annual salary of more than $200,000. Mr. Hall’s company, Harbinger LLC, also was paid $143,425 between August and September. His campaign also spent another $1.1 million on direct mail fundraising pitches. Mr. Walker’s report also shows $20,860 in general election contributions that the campaign must return to donors. [emphasis added]
The complete solicitation