Heh, I have a 7kg LG front-loader and probably wash every 2-3 days. I usually separate lights/darks and will wash sheets/towels separately from our clothes but that's about it. Everything else all gets chucked in together. I have managed to wash a super-king doona cover in my washing machine, though I probably wouldn't try the doona itself.

I cheat though, hardly any of our stuff gets hung out on the line as DH has horribly bad hayfever - he suffers less if I use the dryer than when his clothes get coated in pollen hanging on the line.

Though I did see that LG go up to 10kg for a front-loader now.....