Start with data to figure out how to scale. Then do more of what works.

Thinking back to your in-person sales:

Who are your current clients in terms of occupation, age range, and hobbies/interests?

How many knives do they buy from you at a time, and what kind of customers are repeat customers?

How do they usually find you? What about your product appeals to them?

Stripe is free to set up, invoices/charges your clients automatically based on your specified timelines, can be added to your website, and takes a 3% processing fee.