@DanielKenning, I’ll post how I did it as it can be helpful to know how others did it. But your personal situation may vary.
1 Installing emonCMS on Ubuntu. This was on a laptop, but on a Raspberry Pi it should work the same. Still on my 2DO-list.
2. Reading modbus kWh meters using EmonHub (SDM120 and SDM630) . I don’t know what meters you have, but it will should be similar.
3. Posting Data to Emoncms with MQTT (Python). At the moment no emonhub interfacer exist that will read daisy chained meters, so I decided to look for a self written Python script. Still a work in progress 
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I’m also still trying to figure out how I could do things the best and I already found lots of info on the forums. Hopefully my info is useful on way or another .