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Yes, you print a PLA model, put it into a bucket with sand/clay, and pour hot yummy molten metal into it.
The PLA will melt, is mostly non toxic, and you can produce metal parts in your back yard...

The problem is the complexity of Laser Synthering printers, I am not aware of any (new) metal printers in that price range.
I'd recomend the lost-PLA-casting method for metal objects, or prototyping...