The McGuire's had the biggest osage operation I had ever heard of, two people working full time around Nashville, Mike said they sold 30K staves over time. A good part of their time was spent traveling all over the country to tournaments so they could market the staves, this in itself is expensive. They sold some online but then they had the packaging and shipping. They weren't getting rich in the osage business and appeared to be just scraping by. There was also the physical toll that this kind of work does to your body; Mike's shoulders, arms and hands were a wreck from drawknife work.
I don't think an operation of the scale that you envision would be profitable, the market just isn't out there, most of us serious (in my case former serious) osage bow builders cut our own wood.