I think long term there is no reason for Electrochemical Additive Manufacturing (ECAM) to stay expensive as it uses TFT display technology which is mature and electroplating solution is widely available. Maybe patents will keep it expensive.
It builds on normal electroplating which is already a safe DIY activity, best not do drink it though.
This is selective electroplating by only applying electric current to pixel sized areas and building up the object layer by layer like a resin printer. It's truly amazing what it can do. It's just really new.
