I don't have an answer to your question, but, as a real estate and architectural photographer, I have these thoughts.
Scott's method is useful to see and understand, but I find it is not always practical for the "normal" day to day real estate photography business. He uses multiple flashes on stands and spends much time setting up each shot. His goal is to get the perfect exposure, image quality, and dynamic range in the camera to avoid post processing as much as possible. This means that the typical 3,000 SF home may take several hours to photograph, and you still have some PP to do.
To make a living in RE photography, efficient workflow is key. The most successful RE photographers (that are not at Scott's level) making around $200 per property, shoot 3 or 4 homes per day --- not physically possible with the full Hargis method. Not to mention the cost of the extra lighting equipment Scott uses.
The full "Hargis Technique" is appropriate for architectural photo jobs where you deliver fewer high resolution photos for publication that will "live on" longer than the RE listing and sale (and that pay a much higher fee than for RE jobs).
For the typical 3,000 SF home, I spend an average of 1 hour taking bracketed photos with a single off-camera flash. (70 to 80 shots to deliver 40 to 60 final images.) Then, 2 hours post processing, blending the bracketed images, correcting white balance, correcting lens and perspective distortion, cropping, and sizing for MLS, Brochures, and web. Turnaround time is important to my client RE agents. I promise 48 hours, but try for 24 hour turnaround.
Oh, and for most of my interior shots, ISO 100, F9. For some shots too tight for the tripod, ISO 400 hand-held brackets. My exterior shots are all hand-held.
This "abbreviated" technique is the choice of most RE photographers according to the posts and polls here:
http://photographyforrealestate.net/