Your questions are difficult to give accurate answers to as there is many variables in wireless,
but the CCQ will determine how much bandwidth you can supply to the customers.
What is the max distance from AP to customers, Is the frequency you plan to use clear,
Will the single sector provide coverage to all the customer, LOS, etc. …
Real world actual performance can be calculated for guidance only,
In short provide more information about your project and then other users could reply
giving advice.
for me 65 clients with 6mb seems to be limit before service degrades. NV2 + fp > of course not all clients are using 6MB at the same time but this limit seems to work out for me. It all depends on your clients behaviour. If they are all normal surfers then you could probably go more, if the majority stream IPTV the limit will likely be much less