RE-UP agency

Your marketing agency team should have a proper hierarchy focusing on:

1. Acquisition
2. Monetization
3. Content

As per SEO Expert, Neil Patel, there is no rule about hiring any number of people, but recruitment for your dream team based on the needs and budget of your business.

Your first goal should be to hire at least 1 person for each of the above said category. This will help you make someone accountable for all of the core responsibilities. 

Your aim should be to leave no stone unturned when you have to source the best talents for your business. Get the right cultural fit and a strong onboarding program to hire the right candidate for the right job.

On the other side of the coin, you can remain a consultant anyways if you do not want to work in a team. It has its own advantages and disadvantages. Only you would be able to choose best for what you want to go and how far.