The typical/traditional teardrop has the kitchen outside, and the sleeping area in the front.
The RV industry and the homebuilt community have gotten on the bandwagon and started calling just about anything a "teardrop"
This is America, so you call anything you want a teardrop, but just because you can call a Ford a Chevy doesn't make it so...
The big distinction is that in a traditional teardrop, there is not a bathroom, and you can't stand up.
All the other types of trailers that have those amenities, and allow you to stand up inside are really cool, but they are small or tiny travel trailers.
It really sounds like what you are after is a luxury RV of considerable size that is super lightweight and can be towed with a small car.
It is something many of us have been searching for, and trying to design for years...
With every style of camping, there is compromise.
With an exterior kitchen, a teardrop is great in good weather, but not much fun in the rain.
Having a camper big enough to hold 3+ people, have a bathroom and kitchen, and not be crowded on a rainy day simply doesn't fit the definition of a tiny travel trailer.
A teardrop is even smaller.
Rob
