HI Andy
The first clean using a wfp will probably take three times longer than traditional (that is if you want a spot free finish first clean), but after that, you can be up to twice as quick as traditional.
You do not need to dry the windows, providing you have rinsed well, the windows will dry themselves and leave a spot free finish.
Unfortunately, brick work will get wet, but this also dries, so this isn’t a major problem.
Transport would rather be an estate car, small or large van; depending on how big a system you wanted. Portable trolley systems can be purchased or you can make on yourself.
I do traditional and wfp and I believe wfp is better and you get better results, plus your clients are happier, because you clean the frames each time.
Hope this helps
Andrew