It is possible to buy the first 6 Packs in one go, followed by the next 6 Packs monthly. This allows you to get the first parts of your build done at a quicker pace.
You will be charged for Packs 1-6 in one go (Pack 1 will be at the 50% discounted rate).
Packs 7-12 will then be sent to you on a monthly basis, and charged monthly per pack.