For chemical free economical PCB's at home, CNC routing fits the bill.
Yea, if you like breathing in fiberglass dust. Some say it's almost as bad as asbestos. It's particles too small for the lungs to expel. But I can't find any definitive research on that.
Well I wasn't about to use business cards to push the dust into little rows and snort it myself, I'd think using a vacuum cleaner hose and a fan to take it outside through a home made cyclone filter would be the trick.
The main reason I would do it as CNC routing home made is that you can then CNC rout so many other things with the same machine, carve faces into scraps of wood, do engraved labels for your equipment ..
Then attach a laser from an old DVD player and mess with laser cutting. or a 3d printer head, or a soldering iron for wax or ice, or a pen for old-fashioned plotting, Woo Hoo ! I miss those pen plotters.