Don't know much about BoP but with their broad leaves and size like that, if it doesn't have much roots of its own, I wonder if the roots can support the amout of moisture loss through the leaves?
It seems to me you would need to keep it in high humidity condition (like a humidity tent when dealing with smaller plants) or trim the leaves off? -- I guess it depends on just how much root system it has vs. the size/number of leaves.
At the very least, I think it would be best to keep the container in a sheltered location like under trees or shrubbery with indirect/filtered sun.
Anyway, to support the plant, I think easiest would be to gather and bundle the leaves together, then cross tie (three-way or four-way) to stakes pushed into the container along the inner rim or into the ground surrounding the container.
If the leaf growth is wide-spread and not easily gathered, anther option would be to either make giant U-pins out of stiff wire to hold down the crown or to snake support strings through the center of the leaf stems.