Doug, so say for arguments sake, you had two jobs booked in for an elderley persons residence which I have done today, parking was poor, you could lets say get approx 25 metres from the entrance, the 1st floor flat was at the rear of the building the ground floor was also at the rear, and your only option was to run your hose's right through the building from your van. I myself even if I had a tm, would use a portable and take it up the stairs or as they always have a lift use that, with the tm apart from h and s issues you would need to extract using at least 150 - 160 metres of hose, I used a 7.5 metre hose and 100psi the carpets were clean and touch dry when I had packed up. I am sure if a tm'er had arrived today and ran hoses right through the building the manager of the home would have sent them packing. I have a flymo and I have a petrol lawnmower, I know which is best, the petrol one everytime, but mowing lawns isnt always the same as cleaning carpets and upholstery.