You do not have to buy all of it, and we will tell you what to skip.
A business that cannot be found needs search work. A business that is found but never called needs the website fixed. A business drowning in enquiries nobody answers needs automation rather than more traffic. Those are three different problems and they cost different amounts to solve
The audit is how we tell which one you have. It is also how we tell you when your setup is fine and the problem sits somewhere we cannot help with.