Oops. I should have said 20,000 uncirculated and 20,000 proof for a total of 40,000. I am only worried about the uncirculated myself. LOL. That's why I said 20,000.
My guess is that Martha Washington will be pretty popular, but as the program progresses there could be a few very scarce coins later on as many lose interest.
I can't wait for the Jefferson spouse coin. Since he was a widower, it is going to have the draped bust design of his era. This is going to be a very attractive coin IMHO, and a more affordable way to own a mint state draped bust coin.