If you grudgingly have to work with a portable, you will hate it. Because I have so much portable work, I have developed systems that work as quickly and efficiently as a TM. I use a high performance portable that gives me close to TM power. I have hoses measured to give me best performance. I have a ramp to assist loading and unloading. Everything I need for a job goes inside or on top of the machine. Except for vacuum or
crb. Time wise on jobs up to 1000 sqft. There is no difference. You learn what works and what doesn't . My portable cleans with 500 psi at 1.5 GPM, with heat and enough vacuum to recover over 80 percent of the water we use in most situations. I never haul it up a staircase. I have a TM for that. Parking is always an issue for a one van operation. Now that I am back in a full size van, there are some times that I will just have to say no to certain jobs. If I was running a multivan operation I would have minivan like the little Nissan's for portable operation with a dedicated portable operator or crew. That way you can park in the underground. Years ago I used to work for a department store as a portable subcontractor. I made as much as the TM guys with less investment in equipment.