hunter,
I write this at the end of day when I worked on the steel chassis, standy quasi-teardrop that I am currently building just to try out a new shape (V-tail).
I've done a lot of steel welding both MIG and stick. But, IF I had access to all the tubing, angle and flat stock aluminum that I can so easily get in steel, I would most likely be doing things a lot differently on this and future camping trailers. (I'd have to learn aluminum welding too.)
Factories, like Feathelite, Aluma and Worthington, have all that, and most importantly, they have the jigs needed to prefab walls perfectly. For that I admire their products and bought one for my own. (My previous trailer was a 6-wide, traditionally-shaped teardrop.)
When I tow my 12-foot Featherlite aluminum chassis trailer, I barely know it's behind my tow vehicle. It only weighs 1,250 pounds loaded. (My 12' teardrop weighed 1,800+ pounds empty...4" channel steel chassis with steel floor.)
The interior volume of a cargo trailer dwarfs any teardrop of the same length. Ergonomic versus non-ergonomic. I've started calling "traditional" teardrops
rolling coffins. 4'x4'x8'...good grief. For two adults??? Tents are bigger. And that size has become a "true religion" for some nostalgists. I'm a pragmatist. What works better for me is the cargo trailer.
I accidentally stumbled upon aluminum cargo trailers. (I won a Featherlite baseball cap at my first teardrop gathering!) If it weren't for that, I'd never would have gotten on to them or bought one. And, I only bought mine because it was minimally dinged and reduced a grand in price to almost the cost of a steel trailer. I'm really happy with it. But we're splitting hairs here in the big picture. Be happy with what you've got.

You got a good one and you have done a superb job (with your kid) of converting it to a family living space for some upcoming journeys and explorations. That's quality family experience!
It's the journey, not the destination or the means of transportation.
Prem
My goal...
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...is to live in a trailer.