Thanks for the feedback!
Which of the panels do you mean? If you mean the sticks I've actually heard advised to keep them light. The heavier the structure, the more change that it will be too heavy to hold itself - at least with the hubs we used, with other methods it might be fine. The geometry is used wisely to hold itself and be aerodynamic and much stronger than non geodesic structures.
If you mean the lower panels, then the beds will be on the other side. I don't think it will be a problem to keep warmth inside, on the contrary! I'm pretty sure we're gonna need to make a window to let air flow through, else it might get too hot very quickly!