Both of you (Willy & Ron) seem to have a little bit of a chip on your shoulders. No pissing contest here, Willy, beside in your imagination.
And nobody is saying that he should not use a portable. At least I don't.
All I am saying is that there's no need to make it overly complicated. You can achieve plenty by utilizing the other elements. Naturally, one can Wernerize the carpet till each and every cow comes home. And indeed, will get a few extra ounces of dust out. However, most here will deem it unnecessary and very little return for a lot of extra time spent.
If Willy is willing to do it, that's great and I commend him for it. For me though, it perfectly fits the law of diminishing returns. An over kill. Excellent results can be achieved without it.
Ron, I am in San Francisco. Plenty of high rises, which I have served for 25 years. So, I should have some clue as per what can be done. And no, I never made as much per hour, when cleaning in high rises. I did charge more than 25% extra compared to TM and to begin with I've never been a low cost leader. When considering ease of use, less stress on the back and more efficient work, the truck more than paid for it's cost. However, (do read my posts again) my comments have not been about portable versus TM. They have been about what portable and what kind of a setup.
And you're right. Plenty of money to be made as a porty cleaner. As a matter of fact, one can specialize in it and be quite busy and financially successful being a dedicated porty cleaner here.
As long as they don't make it more complicated than need be. Not that there's anything wrong with it.