I would concentrate first on selling. Where do you intend to sell? Who is your customer? How will you get your product to your customer?
Buying and selling product at the beginning will be a lot cheaper than investing thousands of dollars in growing iris, which may or may not sell. Buy iris in smaller quantities to resell until you have built up your inventory. Consider expanding your line. Iris has a short season of flowering - what will you do for cash after it has bloomed?

I have propagated and sold iris as part of my nursery line. You will need permission to propagate any that may have a named trademark, and may also be required to be licensed and pay royalties to propagate any that have patents. Mine were also required to be inspected by my state department of agriculture. We found our's to be rather work intensive to maintain a weed-free environment (require to pass inspections) and also to keep on top of pests, particularly borer. We also did not ship the product out of the local vicinity because that is another issue as far as phytosanitary permits. Our's were sold as potted stock, so bloom date is not an issue, but if you are carrying a large stock of different varieties, you will need to provide excellent labeling, since the most unusual will demand the highest prices and people need to SEE the blooms, if not in season then by photography. We had many planted in display gardens.............that is what woos and sells them and they're much easier to care for grown as field stock rather than potted. It's the easiest to take orders and sold as bare rhizome at appropriate planting time. Get your ducks in a row first as to your dept of ag regulations, decide if you want to work mail order and find out what regs you will need to follow in that respect as well. If you have an extension department nearby, contact them. They usually have agents to help you with the economics end of an agri-business or can lead you to who can help you get up and running.

Thanks for all the input. I am a former professional gardener and I have semi retired from that so I am fairly familiar with the industry but have never wanted to go into having a backyard nursery so I have much to learn. Thanks!