Right now I am not mobile. I require an electric outlet. I think it will take about a year before I can go the mobile / off grid route. The electric sharpening system makes too much noise to do inside a shop, as it would distract the shop's customers. I hope to find a couple of local stores that will let me set up outside their store, on a regular basis. My manual / hand process is okay for the sales events the wife goes to, as those have very limited sharpening opportunities. My manual system take between 15 and 30 minutes per knife, depending on the dullness of the knife. My prices are very low ($5.00 per item), so I need to be able to sharpen an item quickly. I may approach the shooting range I volunteer at, to see if I can't offer to sharpen items at the range. They have the space and a nice bit of daily foot traffic. Just one of many idea's.