On the high performance level....great, you'll have the relief valve set at level that will maximize your 2" hose.
On a physics level, you wouldn't have had to make any adjustments if you were providing a path of least resistance and running the 4 2 the door already, on a 100' hose run, to have 2 Fifty footers evacuating the contents of a single 2" hose from a single 2" wand just makes the whole system work easier, and provides more NET lift at the wand, hence drying carpet faster.
On an employee/training level, I could give a hoot if the employees like the additional 60 sec. of set up and break down, they will work faster anyways, it's actually a net time reduction with a improved job quality, so just git er done and be done with it.
And yes, investing $250 into a 2.5 set up would reduce the "perceived" PITA factor and still deliver the above improvements.
But...you probably Already have the 2" Y from when you split off and tag team upholstery, just flip it around and show the boys how it's done. and you ain't gotta buy squat.
