I currently have a small ISP using Ubiquiti radios, and I would like to log the bandwidth usage between my system and our provider (a fiber connection). I’m currently using an EdgeMAX router for this purpose, and while it displays the live throughput via bar graph, I don’t see any way to log the data. I do have two Microtik PoE switches in my system, and they seem to be exceptionally customizable. Is there a Microtik router with PoE as well as an SFP that will allow me to log the bandwidth usage? Thanks!
Have you tried using SNMP to monitor your throughput on the EdgeRouter with PRTG, Zabbix, Mikrotik Dude etc ? It might save you some work 
https://help.ui.com/hc/en-us/articles/205223500-EdgeRouter-SNMP
But do consider Mikrotik for your routing needs - I believe they are much more programmable than other brands.