I have a large “over/under” Durston mill. 158mm of flat on top and the same in graduated wire grooves below. It is my third Durston. I’ve sold the others as I’ve moved up for close to what I paid.
I roll most of my own stock, recycling scrap, and making rod/wire and plate/sheet as I need it in gold and sterling. I do buy large bronze sheet but also roll out small amounts from ingots poured from the bronze scrap. I should say that I also now have a similarly sized Pepe power mill for rolling out flat stock. I bought it because i could see a point where my body would prefer the assistance of a motor when rolling out wide stock. I’m really getting to like it.
Owning a rolling mill provides me with the freedom to change guages at will, and to have new stock on hand pretty much whenever I need it (providing I have scrap or shot to begin with). I can also try something experimental and if the metal is still clean, start over should it not pan out.
I also forge in the mill. What I used to taper forge on an anvil, I now step-roll and the refine with a hammer. (Not in the case of steel.) I also create and refine surface in the mill.
So for me, the rolling mill has become an integral part of my studio practice. I use it many times a day, every day.
Just my two cents.