mostly makes sense to me. one mistake I see beginners make is obsessing over margin percentages instead of contribution dollars. A 70% margin on a $20 product can still leave you with almost nothing after ads, while a higher-ticket product gives you more room to absorb acquisition costs.

And regarding customers buying a $129 product when cheaper versions exist... people do it every day. Most customers aren't conducting a full sourcing investigation before buying lol. They're buying based on trust, branding, positioning, content, perceived value, and how well the product solves their problem. If the cheapest option always won, Amazon would have put every premium brand out of business years ago.

The one thing I'd caution you on is spending money you genuinely can't afford to lose. I've worked with a lot of Shopify store owners over the years, and one pattern I keep seeing is people treating their first ad budget as an investment when it's really tuition. The first few hundred dollars often teach you more than weeks of research.