I doubt it to happen at all to go to zero. Alone because its simpler to let Nature handle this. You need no lab, no patents, no electricity. Just time, care and a kitchen.
How good $11 is depends also on: How much meat. $11 per kg would mean its still more expensive than other "undefined industrial meat" for human consumption as producer. If you sell the same meat as premium dog food, it costs $40 for the consumer, BTW.
If you could get the production to something of multiple hundred tons per day, at a few cent per kg, you could have something to replace the unidentifyable meat patties in a fast food restaurant. What they sell there is really cheap, even in Germany with pretty high standards, it is still only by small definitions better than slaughterhouse waste.
And to your friend: If they are smart vegans, they will refuse to eat it. Smart vegans don't replace meat, they simply eat something that is not even reminding them of meat. Vegetarian sausages for example are more for meat eaters who want to eat a bit less meat for a month.
