There aren't a billion men in the world who would even do this for 1k. A lot of those men are old, young, not bald, don't care that they're bald, in poverty, etc. There wouldn't even be any profit in doing it for 1k. It will take a decade for it to come down to the price of a hair transplant in a first world country.You can make close to a trillion scaling it up to the masses though. There are 3.5 billion+ men in the world. Atleast 1 billion probably could use this technology. Charging only 1k/per would net you 1 trillion.