​CRM for solopreneurs that handle new customers by phone

Hi

I am doing research if it would make sense to make CRM for small time entrepreneurs like plumbers, craftsman, maybe layers that rely on phone leads. From my experience whenever I call a handyman they have no process. Best one have a cork board at office and move paper notes. Worst just improvise.

So would a system that collect missed phone and sends a form to a customer help? Having kanban board for tracking leads etc. Are you working alone? Would that thing help you? Or what would make it helpful?

thanks

-vG