You would probably get more traction if you tried to explain your issue from the perspective of avatar development. In other words: what about this limitation is making it difficult to make a digital representation of oneself?
If you are just trying to create something whacky, like those avatars with built-in rollercoasters, that’s cool and all, but you may just have to accept that limitations like these are inevitable. At least until some sort of prop/inventory system gets added.