Man, I'm looking at both chemical and electro etching, and first glaring thing, I don't see anyone using it to fully cut sheet metal. Maybe it's just not heavily discussed. Second, there aren't any machines out there to purchase. I don't want to even consider this type of application without heavy safety features that usually come with something built by a company that is a subject matter expert. I see people using car batteries, phone chargers, etc. It's downright scary.
Trotec Speedy 300 - 80 watt
Synrad 30 Watt - CO2 Galvo
LaserStar 3804 - 50 watt fiber - SPI Source
Tykma Minilase - 20 watt fiber - SPI Source - (MOPA)
CorelDraw X7