Well it depends on numerous factors when they finally ship it out. What will the price be, difficulty, etc. I think it will be extremely profitable for the first batch, yet subsequent batches will not have nearly as quick of an ROI. I do know that if you  were to receive it today you would mine about 150,000 Sia a month or 1300 dollars. But still I would hold it because I think if they successfully implement much of their roadmap the price could reach one dollar.