You don't need a rebuild to get your website looked after. Taking over a site somebody else built is normal — it just starts with an honest look at what's there.
A site was built a few years ago. It works. The person who built it has moved on, isn't responding, or was never really available. Nobody has updated it since, and nobody's sure who has access to what.
That's not unusual, and it doesn't require starting over.
That check usually surfaces at least one thing the owner didn't know about. Most often it's the forms.
Some sites aren't worth maintaining. Built on abandoned software with no security updates. So slow structurally that no amount of attention helps. Locked to a proprietary platform that can't be moved or meaningfully changed.
Paying monthly to keep something like that upright is worse value than replacing it. That's a judgment worth making honestly at the start rather than billing around for a year.
The ongoing side of that is ongoing updates and edits.
Often the problems are specific and much cheaper to fix than replacing everything:
Being told honestly which category your site falls into saves more money than any discount.
Describe what your business needs and you will get an honest read on what would actually help.