One thing that certainly won't work would be trying to set up one powerful indoor Wi-Fi AP in your apartment with a signal that reaches into the rest of the apartments in your building and nearby buildings so well that people can just associate their laptops and smartphones to your one mega-AP.
Outdoor Wi-Fi gear can use higher power, but doesn't necessarily have good in-building penetration. The stuff sold for longer ranges is generally for point-to-point links with directional antennas.
There are systems for rooftop "point to multipoint" wireless broadband, but those require you to install rooftop receivers for each subscriber, and I'm not sure that's the way you're trying to go. Trango is a brand that springs to mind.
The best way to set up Wi-Fi access to all the rooms/apartments of a series of buildings is with a fleet of "enterprise" or "public access" class Wi-Fi APs, positioned strategically throughout the buildings for appropriate coverage. There are many players in this market, including Cisco, Aruba, Trapeze, Enterasys, HP Procurve, Ruckus, Xirrus, Meru, Meraki, Aerohive, and many others. There are also many VARs that will help you do a site survey to plan your network to make sure it meets your coverage and speed goals.