Here's something interesting and useful.
https://intrepidcamera.co.uk/blog/introducing-the-intrepid-enlarger
https://intrepidcamera.co.uk/blog/introducing-the-intrepid-enlarger
At the bottom of the page, you can sign up for Kickstarter.....
If you read about AA's early photographic career, he had a solar-powered camera conversion. The darkroom window was blacked out and a sort of giant scoop directed light to the back of his camera, placed against the window. Paper was placed in a vertical easel. It sounds clumsy but workable. California provides a more reliable light-source than Yorkshire, of course.