DEATH 3d stl files for CNC 3D print model

I've imported the model in 3d Builder, IdeaMaker and CURA. All require the model to be repaired, but none are able to clean it up. Each run for over 12 hours and never finished. File dimensions are in inch instead of metric, so they must be scaled to use on a printer. My desired use for this model was to machine it on a CNC. It is only in .STL format but I need vector graphics .SVG format. Still working on repair and conversion.