The tools are out there, and a handy owner can get a basic version answering calls in a weekend. What takes the time is everything after that. Teaching it your prices, your hours, and your service area. The angry caller, the Spanish speaker, and the 2 AM spam calls burning your minutes. A calendar it can book without double booking you. And somebody watching it, because a system that quietly stops working is worse than voicemail. Voicemail never made you believe you were covered.
That watching and tuning is the real job, and it never ends. It is what the $297 buys: a front desk that is set up right, checked, and improved while you stay on the tools. You never have to think about it. That is the whole point.