+1 for what has already been said for the advantages of having a pug mill by Mea and Mark.
I wish I’ld bought mine at the beginning of my career. Got mine around the time I had a complete tear of my bicep (long head) on my right side. I’ve also have had several sentinel lymph nodes removed from right side for other reasons. Supposed to reduce “trauma” on that side now to help prevent lymphedema in right arm. The clay I use is fairly expensive so I do reclaim everything and have also mixed clay from scratch with it. That wasn't worth the dust and time but I learned from it.
Buy a pug mill or not, this is isn't a one size fits all decision.