You're all fooling yourselves. No-one would ever make a fully featured board with everything. There is no money there.
Minimig is fun, pure, retro-gaming with the main feature over original classic hardware being it's form factor.
However will there be enough people prepared to pay higher than eBay prices for what is effectively a mini A500 (and one with slight compatibility issues at that)?
I dunno.
I felt that the floppy disk emulator project had a much higher chance of being a commercial success both in the Amiga and other Retro gaming circles.