An artist called Miguel Zavala has put up the templates for 300 D&D figures for 3D printing on Shipways. They are free to download and created from D&D manuals.
I've no idea of the cost /quality comparison with cast minis at present but I do know technology always gets cheaper from its initial launch.
Suspect this is a straw in the wind.
3D Printable Figures
by John Lambshead | May 9, 2017