It's done when it's done. It's all of the above in one, and we want to make it good. No quick rush to make money. This is a fan project to build _the_ accelerator we weren't able to buy.
It won't be cheap. As said before it's so much devices in one and production will for sure cost EUR 100+. Unless we have at least 500 backers, which would make this much cheaper. We'll see if we set up some Kickstarter or similar.
EDIT: Attached PDF with outline and CPU adapter pins marked. Pin1 of the CPU would be on the lower, right hand side. It does not directly fit into an A1000 but would need an adapter PCB to move it by about 2cm. This would also elevate it enough to make it float above the piggyback.