My only advice will be this : do not buy a Kiam , utter garbage , I bought one when I started my business 2 years ago , really without researching , and because it was local , you may as well go to the casino and whack your money on "0".
I purchased from jetmac last year , have to say I got no complaints , yes it's only a GX200 with fitted 20 metres of hose on a reel , but I have had no issues with it at all , sucks the water straight out of my baffled tank on my van , it does the job , and gets results , and have never had any complaints ..of course I would love to upgrade to an even more powerful machine , but you try and get the best you can .
I've invested in water fed pole equipment to do pure water window cleaning as a bolt on now , as it frustrated me to see so many window cleaners doing driveways etc using rubbish electric pressure washers , so I thought right if I'm losing business there il get some custom with the window cleaning , and I don't care if that p...... Mr window cleaner off , it's become every man for himself .