The company has more than ten buildings and hundreds of computers. How much does it cost to build a local area network?

First of all, hundreds of computers need at least 8M DDN to access the Internet (different operators call it a private network). The charge of each operation outlet is different in different regions, and Dongguan, Guangdong needs at least 2000 yuan/month. You should also buy professional routers (estimated at more than 2000 yuan), switching equipment, cabinets and professional firewalls. Plus construction, wire, no matter how to calculate, it will cost tens of thousands in the early stage, and it will only be a network fee in the later stage. There is a software, homeshare, which I have never used. But look at its description, there may be some breakthroughs in thinking, please pay attention. I'm also thinking about the pros and cons of his connection now.