Squarespace is like $20/mo for a basic site promoting your Brick and Mortar business. That includes domain, hosting, and a template/CMS. It's not that pricey.
It's not pricey if you are a serious business making good money. It's a huge price if you are say a part time artist just wanting somewhere to store a price list, gallery and contact form.
I'm just surprised there is nothing that fills the gap between github pages and a full hosted solution with a ton of junk you don't need. All it really needs is maybe a locally running app that can handle generating the static pages and uploading them for you.
The barrier to create a website using Astro + a Template + telling an LLM like Gemini what you want is very low nowadays. So still, if you work with code some technical knowledge is required, but it will only get easier, probably.
There is very little chance a non developer would make it through that. The current options are Instagram/Facebook page which is free and easy. Or a website which is either expensive or requires you to be a developer.
Let's be more honest: if the power is on, the sheriff isn't locking your doors, but customers can't reach your web presence, the problem isn't really "the entrepreneur".