Well my own system is like a mini-van mount, operates out of the back of my Toyota Corolla hatchback.
On my domestic accounts it mostly works absolutely fine; I have 50m of standard size hose and about 15-20m of the smaller pole hose.
I pop the hatch, turn on pump, pinch hose shut so I don't waste my precious pure water
Make sure I have the right length of pole for whatever size property I am on and then walk around to the furthest point of the house and then work my way back around the house.
A standard, stand alone semi that would take about 15-20 minutes to do trad I can do in 10-15 minutes.
I'm not talking about going at full race speed, done as fast as possible you cold do these houses in 10 minutes using trad, but you would be going flat out and the frames would not be done either! (they are with the WFP)
Even a small house can be done just about as quick as with trad methods.
It is all about planning how you get around a property.
I also have a trolley, sometimes it is quicker with the trolley, or rather it is impratical to use the house from the car.
If you have a van, then getting a trolley out is the work of a moment. And as you already have all of the gear you need, then getting hold of a trolley is not expensive (depending on your system though you may also have to get hold of a pump box if the one you have is integral to your van mount system)
And then of course there is always the backpack for those awkward to reach properties
Regards,
Ian