He overlooks an option in his arithmetic: Move to a low cost country.
Move to Buenos Aires or Bangkok. Even a less exotic place like Berlin is way cheaper than the US. You could afford a far higher quality of life on way less money. Continue to target the US market with your software.
Berlin would cost more than the US. Perhaps Tallin would be cheaper? It's tempting as an EU citizen to move to the US to create a startup simply because of the lower costs of living.