Deleting the overlaping parts of surfaces


I am have came up with the following form layout and now trying to imagine its feasibility from a simple perspective of material cost per square meter. Thus looking into options on how to reduce the surface area.

I would like to get rid of the surface areas which are overlapping with adjacent shapes. In other words, leaving only the surface areas which you see externally

I hope the question makes senses. I would appreciate any leads or directions what i should look into or which way it might make sense to go

i am looking into result similar to this