I also collect shower water in a bucket and use to flush the loo. As it takes a while for hot water to come through I collect the cold water as well, sometimes for my few plants, or else again for the loo.
I saved a bucketful of water this morning in the shower :D
I use an electric steamer, they are more cost effective than a stove top the same way as an electric kettle - the element is only heating the water, not the pan itself
I think I've stumbled across the yorkshireman sketch:
"My bathroom sink empties in to the toilet cistern " - loooxury! I've fitted an alternator+battery to err indoors now she only hoovers with her own energy.....