Scaling a business can only go so far by selling more of the same. Once you have reached capacity you will probably need to look at a new, scalable business model that requires less of you, the business owner. For instance, offering service one to many instead of one to one.
Hudson Business Advice offers courses and group coaching as well as individual coaching so that I can optimise my time and make our services affordable for more people. My books aim to offer this too and we have a range of ‘products’ at different price point but, more importantly, different levels of my (limited) time
To free up more time you can look at using technology. Not just AI but other software too. At Minerva Accountants we use Apron or Hubdoc to speed up bookkeeping. These apps incorporate optical character recognition, machine learning, and other AI technologies to suggest coding, so our bookkeeper spends less time typing data and more time reviewing. With up to date bookkeeping, we can offer our client better advice.
You may also need to start delegating more. Not just to free up my time but I like to find people better than me at specific tasks/roles. You can use written procedures and reviews to ensure that work is carried out to the highest standards.