Homebrew PCBs

>My boards are all 4 x 3 inches, but the attraction of
>EDM is it is the cheapest way to go, and it can be
>left on its one to process with virtually no board
>preparation, and no ink or etchant costs.
>
>Roger
>  
>
 
  Inkjet is preeminiently reliable, with low costs and little extra work 
for etching.  Far more likely to have to watch the EDM or have more 
often mechanical problems, plus wire and electricity isn't zero either, 
even expensive ink will work out very low cost per board when it's only 
used for PCB.  All things considered it's unlikely to actually beat out 
the inkjet, and even if it did it'd be so marginal for the extra work of 
setting it up and keeping things running.  Doing it for fun is one thing 
since it'll be very cool, but if you're expecting practicality I doubt 
it'll work out too well, just hard to see it coming out ahead by enough 
to make a difference.

Alan