I love the sound of that old sink!
I've got loose plans in my head to make a cycle washing machine when I get settled off-grid, I've never seen one before, but it strikes me a no-brainer - a washing machine drum, connected to a bike with manually controlled water inlets/ outlets - it'd be a bit of a mission, but very achievable, and a spin work-out too.
There are small hand-cranked ones commercially available:
https://www.amazon.com/dp/B07FTVRV6P/
Haven’t looked, but I’d be surprised if there weren’t bike-powered designs on the web.
I couldn't imagine hand cranking a wash - cycling seems so much easier, it must be a thing already!