Retail can be good, I picked up a shoe store for $400 that took me 2 hours. They vacuumed with the identical vacuum I use, The aisles were straight up and down. I show up with the machine, pads and enough chemical mixed to complete the job. I have 6-2.5 gallon jugs that I can mix at the shop. That's one of the reasons why I like the Sprayborg and the
Phoenix. So easy to swap the jugs out and keep going. Retail is probably not great now but if things pick up, go by your local mall and check out the stores with carpet. Usually pretty easy in and out.