2nd washing machine?? How many people do you know with 2 washing machines???
“Biodegradable” is a marketing term.
I’m not knocking people who use disposable (biodegradable - HAH) nappies, but that doesn’t mean that washing reusable nappies is something impossible for most people. If anything, disposable nappies are a relatively new invention.
Maybe with current electricity prices the maths has changed, but washing reusable nappies worked out far cheaper for me when my kids were using them.