Depends on the price point you want to charge? Twirling diapers @ 2500ft²/hr is going to command less than hwe @ 1500ft²/hr. Since it sounds like 100% employee labor I'd hwe, however if it's fixed price work I'd vlm.What pads does a Cimex use for absorption? I can't find them online - all the ones I see are scrub pads.
And yeah I definitely want to know the most efficient setup for Portable use at 300' - many of these places are jobs being done at night, in secured buildings, so running hoses from truck mount is just silliness.
We have our own in house system of working towards the exit point solo and never pulling hose or dropping sections on long strings as long as you have the power to begin with.