I have 5 clotheslines each 10 feet long and doing jeans socks, underwear, sheets, sweaters and shirts. It took almost all of the 55 gallon drum of water which is why it will be important that you recover the water when you can. The last thing I washed was the cover for the wringing bar and just hand squeezed it since it is light cotton. I noticed I used much less detergent and most of the water consumption was for rinsing. What started out as a way around not having Jim there when I had to wash sheets, worked out very nicely.
Necessity is the mother of invention.
A 2x4 between two pine trees. It is attached to the back of tree so any pulling didn't land me on my behind covered with a spare piece of light cotton fabric tied to the bar. An old frayed dress shirt or old pillow case would work well too. If you wait it may go out of print or may be difficult or impossible to obtain when you really need it.