borpin
(Brian Orpin)
36
I think you are way over egging that.
First, it will use the same PS as the EmonTX (one powers the other).
A PiZero is plenty enough oomph.
Case, any local 3D printers or an Aliexpress
Add an SD card, a header (or solder the wires direct) and a few wires and you will be done.
YMMV