Earlier quoted context omitted.
That's not how corporate income tax works though; the company pays taxes on all that sales income less expenses, and then they would likely take dividends at a preferential tax rate and pay yet some more tax. I doubt they've been carrying much of a loss over the past 20+ years to offset this.
It would take 20 years to pull it off, and tax legislation may change, but a married couple can earn next year ~$115k/yr federally tax-free ($89k long-term cap gains + $27k earned income). So that source of income would only be subject to the initial 20% corporate tax.
Asking for a married friend…