I have always been a fan of the "stick-n-move" philosophy in regards to porty operation.
I have become pretty good at surveying a layout, and determining a basic game-plan in regards to how I am going to cover the most ground in the most efficiently way, while minimizing the number of times I will have to reposition my machine.
Seldom do I have to reposition more than once in most apartments, and rarely more than a couple of times in most average homes.
I like to zero in on the optimal first staging position of the unit, where I able to bite off the largest amount of area which includes the furthest areas from "home" (usually being the bathroom or other water source), and work my way back.
As far as I am concerned, nothing kills your mobility like being tethered to a water source and a drain, and having to layout and manage generally longer hose-runs, and having to manage more than 2 cords, and deal with the additional time and potential problems that may arise from the need to provide additional, at times "elusive" separate circuits.
All this extra work and over-complication for such a small amount of addition heat, at generally lower flow.
Assuming your higher amp cord is ran to a bathroom or kitchen outlet using a 50Ft cord, which should be standard procedure for any porty hack, repositioning is as simple as unplugging your secondary, shorter, lower amp plug which is usually in close proximity, moving your hoses and machine, and plugging the second cord in, again, in any outlet in close proximity.
It's not rocket surgery.
Set up is a breeze, repositioning is a breeze, and breakdown is a breeze, and your not stumbling over spaghetti the whole time.
The only other tool to manage is my Oreck, which is just as easy as using a vacuum, and is easy employ as needed, and to be kept out of the way when not being used.
I think most would agree that although employing BOTH a higher heat set-up AND mechanical agitation when using a portable unit is obviously an ideal, but it is not something most portable users would find to be very efficient on a daily basis, therefore it comes down to having to choose between the two.
As I have always preached, for reasons that are to me very obvious, I choose the simpler, less problematic, mobile set-up, with a strong emphasis on the nuke-dwell-scrub
trinity, as opposed to an overcomplicated, time consuming, tethered set-up, while under the delusion that an additional 40 degree's, at best, is going to be more effective than the combination of the right chemistry, and the forces of FRICTION.
One needs to look no further for clear evidence of the effectiveness of the combination of chemistry and the friction of agitation alone, then in the use of any of the popular low moisture techniques, whether a Cimex, jiggler, or other rotary machine, which Ofer no heat whatsoever.