I'm working on a business plan and estimating startup costs. I know the numbers vary wildly from enterprise to enterprise, but I'm trying to identify in my estimates how many people I would need to hire, and when. I am making some assumptions as best I can (e.g. one saleperson could sell (30) units per month) and I realize this is critical for VC's when determining how much capital we need and when.
I can make some other assumptions about developers, and designers; but what about other functions? When do you hire a lawyer, for example, or an HR person? Who else am I missing?
Social Media Manager Lawyer Accountant or Bookkeeper Administrative Assistant(s) Dedicated Marketing person
Are there any rules of thumb or guidelines? I don't want to look like a dunce for example if I say I need a lawyer before I need a social media manager, or that I'd want an Admin Assistant when I can do stuff myself.