I think it is important to start a discussion with the ownership so they understand the purpose of a quality management system (QMS), and that it is not a static system, but one the evolves over time. A QMS helps to create consistency in processes, attempts to prevent undesired results, and provides a method for corrective actions when results are different than desired, so they may be prevented from occurring in the future.
The ownership also needs to understand that drafts of procedures and methods can be created before processes are started, but these procedures will also change when the processes (production or services) actually start, and again when the processes are refined to make improvements.
Verification that the methods and procedures are being followed, are sufficient to describe the methods, and that the product or service outcomes meet the intended requirements, can only be completed after the processes are being performed.
A realistic time frame to implement a QMS from scratch is about two years. I am aware of organizations that have meet ISO 9001 in 6 months, but this is where most of the documents and procedures were already in place, and the entire organization, including management, was involved with the process.
ISO 9001 is only one of many possible QMS available. The organization should select the QMS that most closely aligns with the ownership's goals, and one that fulfills client or customer requirements.
Once a QMS standard is selected, carefully go through each element, assign responsibilities for a person to lead each area, set timelines, and monitor progress. Everyone, all departments, including management, and upper management, needs to be involved. This change is not something that can just be assigned to the quality manager or quality department, and expect it to happen on its own. Ownership and upper management must also understand that it will require resources in terms of time (labor hours), probably software development and implementation, and investment in equipment for process monitoring and control.
With a realistic timeline, ongoing implementation and feedback, a QMS can be created from scratch, just not one that is fully functioning on the day the organization opens for business.