You should use soapnut, its just anut that you soak in water, and doesn't have Sodium/Borate/etc.
I would just send me washwater to the garden.
Dont get a drying machine.
Wash/Spin dry with a industrial salad spinner(to get your clothes dry
enough to hang inside the house in the winter)
Wash with a wonder washer (plunger looking thing), its vacuum action forces water thru the clothes dislodging dirt.
Sunshine/UV is a natural bleaching agent.
For stubborn spot you can use a brush and maybe some oxyclean.
Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat