Whose been the name most often mentioned for awhile? Ubiquiti is a pretty good dollar value for what you get. But depends not only on bandwidth but sessions, too. We had some problems once bceause I think it was too many streams going over one connection. Based on that experiance I don't try to push more than 4 or 5 camera streams over a link, aggregate, depsite what total bandwidth might be.
Hautespot may be an alternative worth looking at, though I never used them before.
Try Korenix Jetwave wireless APs or radios
PTP radio, we have been using since they were released with great success...
Proxim Wireless - Page not Found
There are also PTMP radios, without more information I can't recommend which antennas to use but here are the radios.
Point-to-Multipoint Wireless Network, Wireless Broadband Solutions – Proxim Wireless
Did you try asking FluidMesh for better pricing?