Heres a sketch of an alternative to the weekender theme - it could be built as a lightweight also.
It should be simple to build either way with flat panels all round.
With emphasis on simplicity - rear hatch reveals kitchen top with open storage beneath (containing gas bottle). Splashback behind cooking area with cupboard adjacent. In Galley cupboard is behind splashback.
Roof vent & front window unit could be salvaged from scrap caravan. Doors either side.
Flat profile would simplify attaching an awning.
I've never built a teardrop but would consider summat like this a first project - the camping is more important to me than the overall appearance as it would be towed behind a jeep.