I understand but 30k is not only for batch 1 but for all batch no ?
I think if we have the first batch, we can mine good for 1 or 2 month.
And nobody knows of other special orders of these miners pre-sold through contracts rather than online sales

We're not huge, but we do significant amounts of business with Bitmain and have never been able to get any special treatment in regards to sales. Even when we attempt to purchase 1000 units at a time, Bitmain barely acknowledges our existence and makes us wait for the public batches. Also, the discounts with bulk orders barely even cover shipping. As far as I can tell, they aren't giving anyone special treatment. I mean, why would they when they can sell-out almost instantly without even trying?