Last Saturday, four of us went for a tour of the Stramba Mill. A mini mill will make yarn from batches of fleece that are too small for larger mills and can make some combinations that a bigger mill may not be able to do either.
The pictures are pretty close to the order of the process. But by no means covers the entire process; there were so many steps that I was flabbergasted. Without the equipment the process must be terribly arduous. The mini mill is the way to go. Even then this is a lot of work. The yarn hasn't even been dyed yet.