60 PH/s of chips on hand. So these little dollars-and-cents-per-chip arguments are trivial since the chip costs are already cleared in the books. Electric bill for deployment comes at the end of the month. Mining with GHash (if that's been the case) would've been safest to minimize variance to ensure that bill gets and has been getting paid.
After AM ordered those 60PH chips they were out of liquidity. Since we don't know how much they sold (I'm assuming ~20-30PH) we don't know how much money do they have for self mining deployment, but take note that money are needed for gen4 too in the same time!
Also while electric bill comes at the end of the month there are other bills that you have to pay before you start mining and that is the rest of the hardware needed for miners plus the DC deployment. Also buying large quantities of components for miners usually take a bit of time to arrive and that doesn't help the self mining at all if they were ordered after they sold chips.