I stumbled accross the following hardware kits from M5 Stack that could be perfect stationary nodes / gateways. They are based on ESP32 modules with ASR6501 Lora modules. They come with a nice enclosure and an external antenna and support for rail mounting.
Maybe someone can take a look what i means to support those. ASR6501 based Lora modules are also available as modules that can be connected to other M5 Stack products:
Maybe someone could take a look into supporting those devices because they would be really easy to use and install.