Chemical etching using single sided positive photo etch pcb might just be possible in 30 minutes. It usually takes me ~ 45 minutes from start to finish for a double sided pcb but I have invested in UV boxes and acid and developer tanks. Mechanical milling of pcb tracks using a NC machine could take longer depending on pcb complexity.
It could be coincidence, but I have a feeling that you are in some way connected to the product in that second link.
------------------------------------------------------- Birthdays are good for you: the more you have, the longer you live ... and I've had lots of them so I should know!