dWill the feed motor be capable of pushing wire down a much longer hose?
Don't go overboard with the length. I got myself a 4mt (euro) torch to replace the 3mt one I had but tend to find with 0.6 wire (on car bodywork) being pushed up a 4mt length it does not always work the best. So generally use the 3mt one and 4mt for 0.8 wire.