I do not think that the Rotec is even close to the Ellison, but I have been using Ellison for over 25 years. The EFS-3A, if you can get one, is around $1300, I think. I had a Rotec and quickly sold it. It was an early model and cost me $600, so if it was you would want, it would have been a good deal at the time.
My Panther Building Documentation at PantherBuilder Web Site Daniel R. Heath -?Lexington, SC