Call of the Week- One for the Road

It's been awhile since I've had a blogworthy work call.
I know it's going to be a good one when Kathy says, "You can't leave without one more good one" when she passes the call to my phone.
So here we go:
Me: Hello, this is Adrienne. Can I help you?
Him: Yes, I watched a documentary last night on latex production. (Oh boy...It's never good when it starts with the watching of a documentary). They talked about the rubber plant that grows in South America and Africa, but they also talked about another plant that can be grown to make the hypoallergenic latex. It's grown a desert plant that grows in North America. I'd like to get a few to plant around my house to make a profit.
Me: Do you know the name of the plant?
Him: No, I didn't write it down. It was a desert plant that grows in North America.
*This is where I go into my discussion points about how plants that are acclimated to desert climates don't typically grow well here in Indiana, which is NOT a desert, despite the fireball temps this summer and the recent lack of rains.*
He goes onto say that he has a 3 foot overhang on his house so plants that are under that do not get much water. He then shares a story of how his brother, who lives in El Paso, TX, sent him an agave plant that he planted in his yard. It died. This was my "aha" moment- yes, said, because it's not hardy enough to withstand our winters.
He was still convinced that he could be a millionaire off this hypoallergenic rubber plant. I told him if he could find the name of the plant, we could find out if it would grow here. We hang up.
5 minutes pass. Phone rings. Kathy says "It's him again". Thanks to Wikipedia, he'd found the plant. It is native to northern Mexico, New Mexico and southern Texas. I explain that it would not grow here. (We didn't even get to the part about whether or not there is a market in this area for the plant product). He says he's not willing to give up on it so easily. His brother could probably grow it.

Any bets on if his brother got a phone call?

As we were talking, he said "I have another question." (Oh boy.) He's been collecting seeds from trees that are grown in local landscapes and wants to start a nursery. It's my job to provide information, not to squash dreams, so I didn't even share my concerns about how he is going to start a nursery when he didn't even know that a plant native to a desert in the southwest US wasn't going to grow in southern Indiana. So off I go to look up some nursery production information. He assured me that anything I send to his email account will be immediately received on his cell phone. I told him I'd get it to him as quickly as I could. He also asked about Master Gardener classes, which I encouraged him to consider and gave him my co-workers number for the next class in our area. (Sorry Larry!)