Sorry I haven't done wet folding, I'm huge fan of sharp edge and straight paper surfaces. I have done a lot curling with flower petals, those come out nice, and the marker paper in general is ment work with ink so it has to be able to handle some wetness without issues. I think it might work but not sure at all.
I find the Sakura gelly roll pens to be quite versatile - they come in different nib sizes and the ink never clogs up.
Three legs are stable, if it wasn't that wouldn't be go to arrangement for camera stands. Actually three is more stable than four because there is no chance of one of the legs not touching the floor. This is what causes table wobbles even well made steady furnitures. So three legs is especially useful if you work outside or on an uneven floor.
French easels aren't very stable and their capabilities are limited thanks to the focus on portability. It's not about three vs four legs, they just aren't built as robustly to minimize weight. And I have a different model of the inexpensive Blick easel line. They're basically ikea tier. I use mine for holding canvases rather than working on it. My main easel is a one-off, seemingly homebuilt one i found on Craigslist for like $20 and it's incredibly sturdy and on wheels so I can roll it around my studio space which is nice. Maybe look around on secondhand sites? I paint medium to large oils, not pastels though
From the looks of it your best bet is buying packs from eBay. They're a little pricey but I can't seem to find them being sold anywhere else. Hope this helps!
Faber Castell Pitt graphite
Any sharpeners that you like as well?
Pen knife and sandpaper board. I'm old school.
I ended up going with a Japanese adjustable one with some HB uni mitsubishis that were a decent price.
