I think this is a cool idea and I'm glad this got bumped.  Just like any new invention, the cost of entry will be expensive at first and the results won't be as high as they could be, but you have to crack a few eggs to make an omelette.  I see a lot of people referencing AMD GPUs here.  I'm sure the FPGA idea would be a pipe dream if there was an overabundant supply of RX 580s for $200 each.  Live by the GPU, Die by the GPU.  Smart miners look for ways to diversify.  I would definitely buy one of these.  An idea for OP would be to offer some kind of incentive in the form of future discounts and pre-releases to early adopters.