Applied research report (preliminary thoughts)
Planning on a layout that presents a question, in this case, "Is building an underground house to the style of a hobbit hole rather than a standard underground house, more feasible? what are the similarities/differences?"  still unsure if I want to commit to this direction, more research still has to be done, other possible question could be "what kind of materials and how much would be used to build this house, vs. a standard underground house?"
Following the question (whatever it is) the next stage of the report would be to answer it, as well as breaking the answer into steps.
Comments and feedback are welcome, if anyone has anything to say don't be shy!