'fraid not. While S-Rankers aare allowed to start with 7 scrolls, the fact that each gigantic scroll measures 3 x 1 meters physically limits a ninja of any rank to fewer quantities of the larger scrolls. Realistically, I'd say you could carry three of them stacked horizontally on your back at once. Can't really see you being able to carry them on the front of you person so I'd say that pretty much limits you to three of the gigantic ones. In terms of 3 dimensional size, I'd say you're looking at something similar to this or this for each scroll so use that to base your own opinions on if you disagree with mine.

The 7 scroll limit applied to S Rank ninja basically allows them to select an assortment of scrolls from those available but basic common sense also limits them in the number of larger scrolls they can physically carry.

The rule is that no technique can seal something of a higher rank than the technique itself. In the case of gigantic scrolls, the technique you used for sealing them on your person would have to be S Rank as well. Hardly worth the chakra in my opinion but do what you want