I understand that an Ethernet bus design with hubs has largely been superseded by star topologies with switches and that is largely due to the issues of collisions. However, I am interested in networking a large number (say up to 1000 for now, possible 10 times more in the future) soil moisture sensors and latching solenoids that have very low bandwidth needs. These would be located along rows in an orchard.
Currently, people are generally using LoRaWan or other radio networks, and fewer sensor locations, but these have disadvantages such as of lack of handshaking to ensure message delivery, the need for lots of batteries, and regulatory limits on transmission volumes.
What are the practical considerations for using a PoE Ethernet bus design or are there reasons this would not be a good idea? Is the hardware available to link multiple controllers together this way?