Quoted from Sliderpoint:Wow, you don't read the homebrew threads much. Ain't no way any of those folks have dropped 100k to build one machine in their garage.
They can spend at least several thousand dollars on parts and have a few hundred hours of work into them. And that's only for a one-off machine where parts may have been scavenged elsewhere, rather than buying all brand new stuff. Plus all the friend favors that can be had for free or low prices that you would normally have to pay obscene sums for in a commercial environment.
Some of the homebrew games that have surfaced are very impressive, especially the ones that are fully complete with artwork on them. But the way in which they were built does not usually make them production ready, and that would probably take thousands more and hundreds of hours more.