I think a combination of #1 and #2 would be the best... you shouldn't need to outfit every connection-point with an AP, though... 6 or 9 hard-wired and strategically located should cover the entire site.
This Micro Tutorial will show you how to maximize your wireless card to its maximum capability.
This will be demonstrated using Intel(R) Centrino(R) Wireless-N 2230 wireless card on Windows 8 operating system.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail. The methods are covered in more detail in o…