What reduced my water consumption was taking out the sink and replacing it with an enamel wash basin. I can fill it with just enough water that I need and place it directly on a single burner butane stove to heat up.
https://www.amazon.com/s?k=enamel+w...sprefix=enamel+wash+basin&ref=nb_sb_ss_i_2_17
https://www.amazon.com/s?k=enamel+w...sprefix=enamel+wash+basin&ref=nb_sb_ss_i_2_17