Good luck as you consider this venture into the business world of quilting. I gave it some (very little) thought to going commercial; but decided that I don't want to work that hard anymore--I was born in 1936, and to say the least, I am a mite tired.....I have a Gammill Classic, and several friends and sisters who have learned to use it proficiently and I get to have a day of visiting and sewing when one them wants to use it. That is enough for me. But, be aware of others' using your machines--they don't understand it like you do, and just use it, and can't hear when it makes that little funny noise that sets off clanging bells in your head. I am having to have the repairman in today to check it out from my sister using it last week; maybe just a thing that was going to happen even with me, but an unexpected $200 expense nevertheless.
Keep us posted on your decisions and progress. And where are you in FL; the DH and I will be starting our usual road trips down that way in about a month.