When starting a business, planning is key. Look at what others before you have done who are in the same field. The Internet can really help with that. A site like Professionals Point is definitely a good place to start as lots of professionals have pooled their resources on this page. Getting advice from others in the same situation is always a great way to go.
Find out how companies the same size as yours set up their computer networks; ask questions about how they dealt with Human Resources issues; learn about some of the common basic teething problems professional hi-tech companies encounter and how they solve them; and more.
Enjoy your time planning your business. It can be fun. But it has to be done with care and efficiency. And getting advice from a site like Professionals Point is definitely a way to go.