Hire a professinal or ask a specialised company to set it up for you and train you on the job, so you can maintain it later yourself. With 60 PC's the budget of the IT dept should allow for external support for a week (or for a few weeks).
I have 3 gateways, 60PCs, 2 printers, a wireless printer. I am about to segment these devices so each of them can have a balanced bandwidth. Those 3 gateways are running on the same network at the moment. There also will be several different servers with different functions like AD, DHCP, DNS, etc.
Right now, I am a bit confused to set up the network in the proper way. Sometimes internet can be really slow via LAN connection, and wireless connectivity is totally disaster.
Is there any good suggestion to help me for fixing my network?