I’m sorry if this feels like a cop-out answer, but that depends on what you want and what sort of budget you have. I try really hard to not let budget be a barrier, but it’s not always possible. When we sit down to have our initial chat, we’ll cover cost then to get the awkward conversation out of the way.
A really helpful way of thinking about budget is this: “what are you comfortable spending?” If you need a new washing machine, for example, you’ll have some sort of idea what amount you’re comfortable spending and then you try to get the best washing machine you can for your budget. It’s the same here. You’ll have an instinctive limit on what you are willing to spend (usually based on perceived value) and so the question isn’t “how much is this thing going to cost me?” but ‘how much am I comfortable spending to get the result I need”.
We have that conversation early and try to agree a way forward from there.