Sounds like an "advantage play" to me, if you're willing to give an hour, or less for $15.00. If it is, indeed only 15 minutes, than that equates to $60/hour.
And since it's "working", (as an independent consultant), perhaps you'd be able to deduct your trip expenses from your taxes.
"Hey, I thought I'd try to start a consulting business. Did not do very well and lost money." I know I would believe you.