I have a place that I am using USB Ethernet adapter and getting 3-7 Mbps upload on it.

It is ok… but I have have access to a location with good internet 1.3 km away (0.8 mile) that I could raise and antena and skip monthly internet fees. However, there would be no line of sight and I am worried that 900 MHz band might be quite busy. I noticed that there is an intersection wired up with cameras and what looks to be a PointToPoint wireless connectors. It is close to the remote endpoint that I want to connect and any time I pass the intersection I get interference on phones connection.

It looks to me that point to point antenas look like cheaper option but I am worried about stability. However, I am not sure that an outdoor higher rated 4g antena would improve situation that much since the ‘Bermuda triangle intersection’ is right next to it…