It doesn't matter that you don't live in the US. You should be able to judge by looking at the map that this is a large area, a single wireless AP and a few boosters isn't even enough to cover one large building, let alone a section of a city.OK, no need to be a douche bag, I don't live in the US, so I don't know how big that area is, but I'm guessing you're right that a router and boosters won't be enough... The question mark kinda hinted that I was guessing.
Seriously, this place has some real dicks hanging round slating people who only try to help...
Meraki has a outdoor access point for $200 it works pretty good
http://meraki.com/products_services/access_points/outdoor/
Still $200 if better than $2000
I could go 5ghz rout
So what do you recommond to do for this network