I agree. I once got quite into the console-hacking world (think Ben Heck, and the like), and got thinking quite seriously about creating a successor to the GP32.

I did a lot of research, talked to some finance guys, and realised I was in well over my head if it was to ever be more than a prototype, so I dropped it. Would've loved to get more info than I could glean from the guys I knew who had supply chain and manufacturing experience: their opinion was "don't do it". Probably a good idea that I listened ;)