I'm going to take the liberty of re-phrasing your question to: "Is there an economical way to make foundation ?"
It's certainly economical - and reasonably fast - to make plain (unembossed) wax sheets which the bees will then draw out into comb. But - whether the small advantage of producing more-or-less guaranteed straight combs is worth the trouble when compared with letting them draw foundationless comb from some kind of starter strip is debatable.
Making embossed foundation is a whole different ball game. Guaranteed results certainly can be achieved when running plain wax sheets through a hand-operated mill. The FatBeeMan has YouTube videos showing both the making of plain wax sheets and of running these through such a mill. The results are good - but the mill itself is expensive to purchase, and the making of a DIY mill would not be for the faint-hearted.
Which brings us to moulds. Many people have tried producing embossed foundation using silicone moulds - with mixed results. Some have given up in despair, others claim modest success. But even if successful, it would be a very time-consuming process to produce embossed foundation in this way. If you place any financial value on your time, then I'd say it probably isn't worthwhile.
LJ