any info on the prowler on rotovac site

I don't see the advantage

I'd rather have a small TM or high power Porty

even a  used TM makes more sense

you can't run it inside and you can't reasonably do  a long hose run

what's the point?

I too, have been looking at the prowler.  You can also see them on www.amtexequipment.com for about 300 dollars less.

Bottom line, it's a stepping stone to a big truckmount system.  There will still be more work than with a TM but less than with your current portable. Because of a much smaller blower, you will have less CFM than a TM and the parts will probably wear out quicker.  Continous monitoring and preventative maintenance will help this unit last longer.

On the plus side, it should do a better job than a portable with less work and less downtime than with the portable, and costs about half as much as a decent truckmount.  You can get most parts for it at your local home depot and should be easier to fix than the big machine, and cheaper.

It wont be a TM, but it wont be a portable, you're somewhere in between.