How steep are these costs? Toss around some $ figures.
Using what I've developed to-date, these would be the costs (USD):
DIY Kit - 80MH/s, computer required
* Altera DE2-115 Development Board - $600
Total: $600
Fairly soon I hope to have the LaunchPad micros up and running. So that'd be:
Future DIY Kit - 80MH/s, runs independently (no computer)
* Altera DE2-115 Development Board - $600
* LaunchPad eval kit - $4
* Ethernet module - $25
Total: $629
Supposing a custom board was made:
Possible Custom FPGA Board - 80MH/s, runs independently (no computer)
* Altera Cyclone 4 C115 chip - $400
* Custom PCB & parts - $20 - $50?
* Micro - $4?
* Ethernet - $15?
Total: $469
Anything with a question mark is an educated guess. And of course a custom board has design costs associated with it, which would have to be folded into any quantity of units sold.