After attempting to find fresh water chestnuts for some time to try growing, I finally found someone who sells a few runners at a time.
They are doing great!!! I've got them growing in one of the cheap plastic kiddie pools. I put about 3" of compost and top soil in the pool, then filled it up to about 5" of water over the top of the soil level.
I started out with 5 runners at the end of May. They have multiplied to the point of the kiddie pool being half full already!!! Yummy! I'm going to have plenty of fresh water chestnuts. :)
To save on space, I put the kiddie pool on the cement slab that our a/c handler is on. Out of sight from the front of the house, and it's starting to hide the ac unit from my sight when I sit on our patio.