The current release of Monocle Gateway is generically compiled for newer ARM architecture such as in the RPi3B/3B+. Please open a support ticket via the link below and reference this forum topic and we can provide you an “untested” version compiled specifically for the Raspberry Pi.
It used to be that cameras were VGA resolution and that was easier to handle on wireless connections. The RLC-411WS has a resolution of 2560x1440 and a bit rate of about 6144K bps. That’s a lot of data and excellent for reading those auto license plates at distance if you need to zoom a frame. The downside is that on a wireless connection, you will drop frames due to environmental conditions. Consider wiring those cameras. I have three Reolink cameras on my NVR which is a QNAP NAS.