i've never been able to wash a car in under 1 hour with ONR. If i clean the wheels, including set up and tear down of my wash equipment (coming from my apartment) it's easily 2 hours. Here is my method and maybe you can make suggestions:
1 bucket, 4 gallons ONR standard dilution
multiple microfiber method (creature edgeless from TRC)
large platinum pluffle towel from TRC to dry
48 oz. garden pump sprayer
After trying the 2 bucket method with 1 wash media, I decided to test the multiple microfiber (aka "Garry Dean" on the web) method and I've been using this method in all 4 seasons this past year. I spray down the whole car with ONR using the pump sprayer. If it's really dirty, i'll add half a cap more ONR from the 32 oz. cap into the sprayer.
I don't know how they do it in the videos, but no matter the temperature, in the sun, or in the shade, the panel dries up within seconds. So I take a damp microfiber, wash 1 panel at a time and quickly dry it. Most times the ONR dries on the panel before I get to dry it and I find myself rewetting the surface just to dry it.
I also like using OCW as the drying aid for the smooth and glossy feel. The gloss is becoming a little lost due to all the micromarring and swirls over the year but that's a separate issue. I move to the next panel, flipping the towel to a fresh side as needed. By the end I have a pile of dirty towels, about a gallon or more left of ONR in the bucket. I'll use the remaining to clean the windows or time permitting the wheels.
I've not tried the BRS as the price point is a hard pill to swallow, but are there any tips/tricks for using a sponge? I watched the Forensic Detail video and there's no way I could do that with how fast water evaporates off the panels.
A separate query: to raise money for a cancer walk I offered a free "wash and wax" to donors who gave $30 or more. I would go to their house and use the above technique to clean the body and the wheels. Maybe it was because I would chat with the friend/donors while I was doing it, but the method took me a good 2 hours. Would switching to ONR Wash and Wash and using Opti Seal as a drying aid provide any speed benefits? Or would that mostly have the added benefit of a sealant? I want to do the wash and fast and cheap as possible. Any suggestions are appreciated. Thanks!