Hi Guys, I am always being asked if I can clean roof's but am only a one man operation so politely decline - H&S and all that! However, there could be some good money here - does anyone clean roof's safely on their own and using what equipment? Seen this below for £1400+. http://www.jet-wash-direct.co.uk/pressurewashers/roof-cleaning.html Does anyone own one? Are they any good?