No, I'd think you need employees - or people in the company to interact with. If you're solo (I'm solo for my next adventure), it's not for you, don't spend the money.
No not yet, self publishing, most print-on-demand has bad quality,
there will be a hard copy in the future if I figure something better
than my last time (printing in Poland, FBA at Amazon)
But one should write a solo guide with tools etc.
Does anyone have recommendations in this area as well?