Of course, a $3.00 delivery fee hardly seems extravagant compared to Prim charging ~33x the average cost of completing a load of laundry in one's home.
Any reason they don't just buy organic milk?
*Disclaimer: I've been working on the same model as Prim for a few months and will be launching in a major city in the next few months. The economics are there, even on a small scale. Scaling up is where things get really interesting.