Build using standard parts as much as possible, Open Builds etc. To keep printer usable for more materials will be trying a heated bed with rotary elec union for the thermistor and power.

A simple to assemble, super clean and safe PSU case solution that fits into the OpenBuilds wire management ecosystem

I ordered the OpenBuilds MiniMill from the OpenBuilds Parts Store http://openbuildspartstore.com/ They were out of Motors and Electronics when I ordered so I had to source these items elsewhere. But it turned out well doing it this way.