I am a novice interested in started a worm castings business, primarily selling to local nurseries and attending farm markets (with my child/ren participating along with me

). I am much more intested in the contained units (Wigwam and OSCR seem to be the main ones out there)and am wondering if anyone can give me some personal experience.
In looking at websites, it seems as though the windrows method is primarily in use. If this is true, why?
Great site - I am looking forward to reading and learning more from you all and appreciate any experience you are willing to share!