I want to start a Wireless Internet Service Provider Business in my City. I stay in India. I did a research on internet and found that it can be established using Point to Multipoint Link i.e. One Base Station Antenna and many Client Receivers/ Antennas facing to the BS Antenna. Now the receiver should be facing to the BS Antenna. I wanted to know about the specifications to look while buying Base Station Antenna and Client Receiver Antenna. What are the important specifications and how they affect the infrastructure cost, link speed and data rate? What should be the ideal distance between BS Antenna and client Antennas. Though I am an Electronics and Telecommunication Engineer, I am not so familiar with deep networking. Please advice me. Your help is highly appreciated.
NOTE: They say that the BS Antenna should be Omnidirectional while the client side antenna should be directional parabolic grid antenna.