You can get it pretty damn cheap if you are willing to send your biological data overseas. Nebula genomics and a lot of other biotechs do this by essentially outsourcing to China. There's no particular technology secret, just cheaper labor and materials.
Can you trust it though? It'd be trivially easy to do a 1x read, maybe 2x, and then fake the other 28 reads. And it'd be hard to catch someone doing this without doing another 30x read from someone you trust. There's famously a lot of cheating in medical research, it would be odd if everyone stopped the moment they left academia (there have been scandals with forensic labs cheating too, now that I think about it).
They save money by cheap labour and batching large quantities for analysis. For the consumer this means long wait times and potentially expired DNA samples.
I tried two samples with Nebula, waited 11 months total. Both samples failed. Got a refund on the service but spent 50usd in postage for the sample kit.
