![Growing Your Portable Restroom Business in a Tough Economy](https://cole-promonthly.imgix.net/https%3A%2F%2Fwww.promonthly.com%2Fuploads%2Fimages%2Frobb_barnes.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=0dda5815c81a566c92388bb39c78688f)
Robb Barnes, owner of King’s Pumping Service in Dallas, Oregon, was a teacher (biology and health) and customer service manager before entering the liquid waste industry. Despite economic ups and downs, Barnes, 58, has managed to grow his business every year. In 2015, sales were...