The cheapest workable set of tools for each stage, and exactly when each piece is worth upgrading.
Course hosting, an email list and editing for about $45 a month billed yearly, and the fee to watch as sales grow.
A website, an email list, invoicing and audio editing for about $19 a month billed yearly, plus when to upgrade each piece.
Shopify is built for physical stores. For ebooks, templates and courses, cheaper options may already be in your stack.
Build and price your own stack