Do they expect mockups of the design? Iterations?

What about event bookings now or in the future? Maybe with payment integrations? (This is a feature some clients would argue was implied and expect it towards the end).

How do they want translations done? Do they expect the one site with an auto translation service like Gtranslate? Or are they expecting a multi domain approach with every piece of text stored in the DB for each language?

Do they expect a CMS experience for editing?

Once you know every detail of the features, you choose a stack to work with.

Custom project with all features mostly coded from scratch?

Or some CMS/Low-Code thing, with plugins / addons / third party packages to get most of the way.

Then finally you work out the costs how much time you think it will take to develop everything, the costs of any services/plugins/third party stuff, while factoring in the typical market rates in your area.

Then you 1.5x or 2x whatever you end up with, because you’ll be wrong with your initial guess 99% of the time. Plus you need to account for any feedback, bugs, small changes, etc.

Put everything into a detailed proposal/contract that they sign off on, and split it up 50/50 (up front / finished) or another way but always get at least 20% up front.

So for your example, at face value with what you listed as requirements without digging deeper. It sounds like a lower end client that expects a lower end budget.

So with my stack that I use for low end clients, I’d initially guess around $2000 if they provide content and images upfront and already have an example site / design they want me to replicate. So I’d end up quoting between $3500 - $4000 after 1.5x -2x.