Units are on fourth and building is set up where the front doors are inside the building.
can't go thru a window??
We do a 7 story building and that's how we run it.
Drop a line down and pull the hoses up
To answer your question OP or porty, you'll be better off with a porty.
You already have a rotary to scrub with.
With roto scrub and a porty and you'll be doing better work than 86.93% of the TM guys and better work than 100% of the OP'ers.
plus a porty is more versatile ..use it for upl cleaning and save gas/run time on TM, or if two man crew boost production by having the TM clean carpet and porty on the upl.
Detail cars , back-up unit for TM down time, etc
side note, if the units aren't bad, you can always bonnet clean them with your rotary now
(Chem Lie and Heaven's Best has been doing that forever)
get the porty and don't buy into the OP hype ..cause unless you see mostly low loop pile/com carpet (the only place OP is "decent" ) you'll be very disappointed
Especially if you currently roto scrub and TM flush/rinse extract the bad ones as you say you do
.L.T.A.