Hey, how is everyon'e yangmei doing?
I planted out my last ruansi and pennyslvanica. I am content now. I really don't need every variety either, I will be happy with what I have.
After growing many many yangmeis, I have learned two things.
1. These are extremely easy to grow.
2. They are hardy to around 15f or lower.
If you can grow loquats, citrus, and olives, then you can grow this.
I expect to hear fruiting reports in the next year or so given how quickly they grow.
Much respect to the people on the grind like Simon and Kevin.
Hats off to them.

I believe the best area to grow yangmei in the eastern US would be south GA and north FL. Some start up a yangmei farm there. I'm sure you could turn up a decent profit if you know what you're doing.