Rob, I would still charge £800. It doesnt matter how long it takes it is still 800 sq ft.
As for using the machine you are showing in or on the web site, I wouldnt touch it with a barge pole, it is still a rotary and not suitable for what I clean. It voids too many guarentees to be of any use to me.
Best, Dave.
P.S. Not only that but looking at the web site it appears to be for commercial use only. Therefore I would chose the machines it was knocking as they have more use on the domestic market.
It was a most unfair contest. I.E could it be used in small rooms, landings, cupboards, no. It may have its uses granted but it needs to be put against like for like and it wasnt. For those using the smaller machines can go day to day cleaning whatever they need to. For this megga machine if you dont have 800sq ft rooms it will be sat at the shop doing nothing.
Anyway, results wise it still will not out clean a good hwe for soil removal, ever.