Thanks for the advice folks. A stand is near enough a necessity then if I want to be cleaning my bike thoroughly enough.
I'm happy to ditch the pressure washer approach, would no doubt be simpler, easier and ultimately more effective just using a bucket of soapy water. So will that do? Just standard soapy water? (Plus obviously the bike-specific cleaning things like degreaser, oil etc)
I have a metallic brush thing (I think it's for cleaning ovens) - would that be okay for scrubbing my chain and derailleur? Or should I avoid that and go with just a firm plastic toothbrush?
Thanks folks.
Oh and as for stands, had no idea they were so pricey!