I thought about all these cheap machines before buying mine, if you say a kiam is going to cost you 600-800, then you will be better off buying a second hand machine off ere or eBay and having it serviced. I got my machine, saved up for 2 months and it's prob half paid for itself doing a few little jobs here and there. I do have a nice job lined up for it soon but even without it a could have pushed for work and it could of paid for itself in 1-2 months. For me I was glad I bought a decent one, not the best by any means but good enough.
I think realistically we all want the best machine for as little as possible, but by the time you buy hoses, and then find out there the crap ones that leave marks everywhere, you mays well face it head on and start at about £1500, give or take a few hundred depending on the spec, and buy yourself good equipment that comes with warranty and good after sales.
That's a good deal.