If you have line of sight, look at the threads that discuss ubiquitous point to point wireless.
Yes, it is. If this is your first time working with Ubiquiti radios, this will help:
airMAX - How to Configure a Point-to-Point Link (Layer 2, Transparent Bridge)
Here are some other tips:
1) One of the options on the Access Point side is to choose a Channel Width. Higher channel width means a higher bandwidth link, but it also means you use more of the radio spectrum, so you cause more interference for others in the area and you receive more interference from them too. So if you have specific bandwidth needs, choose the lowest channel width that delivers it reliably.
2) The Output Power can usually be reduced on both radios for short-range links like this. This is mostly to benefit other 5 GHz radios in the area. Often even the lowest output power setting will work fine. Try for a signal strength that is at least 30 dBm higher than the noise floor. E.g. if the noise floor readout says -88 dBm, you should try for a signal strength that is roughly between -58 dBm and -48 dBm.
According to the spec it can do 100 up to 300m. But we all know that specs are pipe dreams.ePoe operates by reducing the link rate to 10 Mbps I think. You definitely don't want that for the backbone between buildings in 2019. LOL.