I am new to networking and need to know what wireless networking equipment I need to set up a business network in a concrete building (consisting of 14 floors and 173 units). A site survey was done (by a company that is no longer in business), and they assessed that I need two wireless routers strategically placed every third-floor of my building. How do I find out which wireless router can do this effectively? And what other wireless network equipment do I need outside of Wi-Fi routers, i.e., extenders, antennas, etc.?