I’ve been an agency owner for a year, at the start I was a one man band doing everything for myself by myself, do I recommend you do this when you start? No. Is it necessary NO!
Yes there is a character building element of starting by yourself and doing everything for yourself. That’s the only benefit, you may get one or 2 clients, but the quality of your service will be poorer than your weakest competitor. Your focus will be split inbetween, systems building, service delivery, lead generation, client acquisition, understanding the niche, understanding the client. So on and so forth.
I’ve recently restarted my agency and I take more of a specialized role of understanding my client and their business. Yes I take calls, yes im still active in the business, but I’m not trying to be a specialist and every single part of my business, I leave that to the specialist.