They may be a third party vendor and sell to nurseries, ect.. That's a lot of irises and a LOT of work instantly handed over. I kow you've expressed your vision though and I too share the same one.
Go with your gut feeling. Also, keep things in perspective. This ain't like buying a #2 at WacDonald's drive thru and switching to a #3 at the window either. Make a serious decision and have a plan ready yesterday. If the finances are right, treatment of plants are great then see into it. I prefer small scale and would work my way up the chain. If you have a significant other as well you maaaaay want to run that by them first also.
I wish you the best in your decision making. I always support people's visions and try to scare them too. You know your worth and capabilities...