Mass production costs still require pruchase of the MC68000 and FPGA chip, those prices will be hard to adjust and I've been informed that there are no low cost Chinese replacement parts for these chips.
Advantage of getting this done is China is that most every other part can be made from Chinese suppliers for lower cost. You still have to pay for packaging, power supply, MMC card, Shipping & distribution.
First costs for a case work is $5 per cost per unit in numbers of 1000. These numners are FIRST COST and do not reflect markups from the agent, and shipping and development costs. Someone would have to design and output a case design and that is even more cash on top of the tooling costs. Initial runs would be more expensive to help cover tooling cost.
Also... tooling a case ads a few months to develpment time (AT LEAST 90 DAYS from turnover of finished model to first shot out of the mold) and initial production units)
