It was suggested I look on tesco direct to see if a cheap power washer came up but there are so many I haven't got a clue where to start...

http://www.tesco.com/direct/diy-car/pressure-washers/cat3376646.cat?sortBy=2

I will have a small monoblocked area in front of the house, not massive but would be nice to consider a washer. Really it's snow foam I want to get my mitts on, love that stuff!

What should I look for spec wise?
What should I avoid?

What products do you then need to buy and how much are they?

Thanks for any help, I don't want to spend less but end up wasting my money on rubbish. Normally I'd shop for quality and pay a bit extra but funds are going to be tight so needing to be a bit clever. So I reckon £100 is max but cheaper and I'd get it sooner.

Thanks