I would definitely push for the company to hire a peer, a second-in-command; for you, that would be someone to verify and bounce your ideas off of, but to sell it to the company, you can sell it as risk mitigation, because right now this tech-first, data-driven direction your company is going into rests entirely on your shoulders, which is very risky; even if you can theoretically manage it on your own, accidents happen, burnout happens, etc. Nobody should be irreplaceable, and this isn't to shit on your achievements, but a higher level corporate thing.