The best way to have got your answer was to have called shop.lego.com CS. Im sure they would have explained.
Sorry, I have to say you sound like a reseller. You have set up a few threads about "investment" and you do indeed come across as a reseller who has just caught the wave of a new money making scheme. Also you added that you want to build these sets as someone mentioned reselling. By the amount of sets you have bought or are buying it does not seem you need to invest to buy more sets to build. Quite contradictory IMO.
I some how doubt you want to build these sets. Hopefully you will genuinely be bitten by the bug of making these sets IMO.