I can only give you partial answers, but here goes.
I use Dektol and my trays are only for 8x10. (you'll have to scale it for your size) For this, I use 200cc of Dektol stock solution and 400cc of water to make 1:2 solution as Kodak recommends. With it, you should be able to make about 20 8x10 prints. It lasts for one session only BUT... if you cover it with Saran Wrap, you can use it next day with no loss (that I can see) of performance. In the past, I did try to pour it into a sealed bottle with no air. It lasted 7 days (possibly longer) with acceptable results. At the rate I use it, it turned out to be more effort than worth, so I don't do it anymore. You may want to try that while you are practicing and perfecting your process, though.
If you use RC paper, print washer isn't necessary. I use tray and bathroom sink for this. Total wash time is about 2 minutes anyway. I do have a print washer but not feeling a need for it so it sits in my storage.
I dry it by standing it up by propping it against something and on towel. Use of squeezy tend to scratch the RC coated surface, and I didn't really like using cloth pin to hang it. It dries acceptably in about 15 to 30 minutes, then I just put them flat somewhere relatively dust free.
I print small batch at a time. Sometimes, one contact sheet is all I make. Another time, I try to perfect just one image. It's rare I print more than handful of frames during one darkroom session. I am not needing any more complex method for my own use. These days, I learned to work slowly. I tend to waste less paper this way and is more enjoyable. Your mileage may vary.... (greatly)
By the way, RC papers do not curl much. I wouldn't worry about it. Also, scratching isn't much of an issue unless you handle very carelessly. (or use dirty automotive squeezy like stupid guy like me)