My recommendation to you is to decide what type of consultancy you want. One where you are in charge but hire a project manager to do all of the day to day management or one where you are in charge and also responsible for the day to day management.
I run my own firm and I love what I do, however I only do actual client work 20% of the time, the rest of the time I am HR, Accounting, and Business Development. My business is nearly 100% referral yet business development still takes up nearly 50% of my time due to the fact that I feel I need to own and manage the client relationships. However I have an amazing project manager to keep all of the projects on track.
I would encourage anyone who wants to operate their own business to do so, just remember it is incredibly important to learn what it takes to set up and operate a business properly before making the commitment. Even if you think you know what you are doing, nothing can beat having a knowledgeable and trustworthy accountant and lawyer to aid you on your way.
The second thing you have to strongly consider is can you recruit the talent necessary to support the business? One of the reasons I was able to start my own firm is I spent a decade building a dependable network of service providers that I can rely for everything I need. I have used these people for a long time and between them and the people they can recommend, I am never left in desperate need of skills or man power to get the work done.
Finally consider the type of lifestyle you want to have? Operating a consulting firm in its formative years can really erode your work life balance. Many people love the idea of operating their own business but are completely unprepared when they discover just how different it is from being a freelancer.