You can. Upload them to your binder and they will run fine. Maybe the layers were turned off when you exported the DXF. OR it's white ink on white paper.
But since you want top shelf you can go with a nice seat of NX or CATIA with their CNC plugins. Only about $35,000 start up cost. For sub $1000 like your previous post... Fusion is it. It's ALL moving to subscription. Solidworks still have a perm license which you can get for $5000 and another $5000-$15,000 CNC plug in depending who makes it.