What is the per-sample cost of eDNA metabarcoding (lab work and bioinformatics, not sample collection)?

I'm not convinced that eDNA is always easier to scale than traditional monitoring approaches. My current understanding is that the per-sample cost, including all lab work and bioinformatics, would be several hundred dollars per sample. In some scenarios the thousands of dollars required to process eDNA samples could be more effectively used to train interns/technicians in more traditional taxonomic approaches, which would also provide abundance data and invest in taxonomic expertise.

The kinds of samples I'm thinking of are bulk preserved insects or water samples (for fish, amphibians, or benthic invertebrates, for example). The application would be for groups that do not have a lab or bioinformatics capabilities, hence this specification in the question. I imagine that cost will depend on the quantity of samples, so lets say several hundred (but if you have information on other amounts please share).

Please add references or links if you have them for cost estimates.

Thanks,

Hubert