Dan,
Not all TM's are equal, not all portables are equal, not all operators are equal.
The extraction machine is a tool - no more than that.
I found very little difference in set-up time between the two - a TM still has to be filled and emptied at some time and if you factor in the difference in maintenance time a portable comes a little in front.
When it comes to cleaning time, that can be a different matter.
John.