Aside from a salesperson, I wonder if Patio11 has considered a dedicated content marketing person to build on that SEO and maintain some level of growth for both businesses? I get it that the goal is to not get buried with work and to achieve some level of passive income, but if you lose the SEO and sales are declining, what are you left with?
He's the guy that loudly banged the drum for content marketing with BCC. The basic gist is that he hired a teacher (iirc) to write a few pages of "Bingo Cards for <x>" every month to have a unique page for a lot of different things. Try typing "US Presidents Bingo" or something and you'll probably get BCC as the first result. Patrick outsourced that page to someone working part time. There area /a lot/ of those pages on BCC.
Also, he made $4,000 an hour on BCC, so it seems like he's left with a lot! And even so, business come and go all the time. Doing nothing on BCC as it fades from $60k a year to $0 over the course of a decade while doing minimal work on it for the last half of that decade doesn't sound like a bad idea to me at all. Sounds like 'free' money.