You don't need to reverse engineer the chips. You may reverse engineer the software, but you don't need it as well. You need to raise 1M USD at least to start with. It pays for an initial design, floor plan, logic schematic, electric simulation, layout verification and the cheapest multiwafer mask with a very small batch of packaged chips. You also need an engineer to lay out the PCB for your miner, prepare the BOM (Bill Of Materials), order these parts and hire someone for the PCB production and assembly service. You need a Linux programmer to get the software running. If it works out and you have a working miner, advertise it everywhere and raise more capital to run the production with an improved design and better mask set.