Vintage Travel Trailer options?

the bear II wrote:
You're going to be limited by using the Lincoln as a tow vehicle.

Most vintage travel trailers (TT) are heavy and may exceed the towing or weight capacity of the Lincoln.

You may want to consider an older well cared for motorhome (MH) instead. The MH would provide space and capacity to carry your swapmeet items plus provide living space. Tow a small car or van behind the MH to carry additional items and for transportation.

I've looked at a few smaller Airstream trailers but found an older Argosy for $100 behind a local car dealer. Its already gutted with just a bed and toilet. The rest is wide open. It needs paint and tires but feels super light, I was able to wheel it out front by hand with little effort. Its got very little tongue weight. It does sit low though, it hits bottom on even the slightest driveway. I brought it home down a short stretch of highway at speed and it felt ok behind the car.
I figure that I'll wait for the next warm day and give it a good pressure washing and quicky paint job. Its got a roof air unit but I don't see any wiring for it.
The rear lights don't work and most of the amber marker lights are missing lenses. I can see and get at most of that wiring inside. The tail light wiring is hidden.
I was actually pretty surprised to see that this thing don't have any brakes, no drums, no backing plate brackets at all, just straight torsion bar axles with some sort of clamp on shock mounts added.

My Lincoln is rated at 2000 lbs max, this thing feels lighter than my old 12" popup trailer. At highway speed its barely noticeable back there. My biggest concern right away is to find some sort of door latch, the outside has a twist/lock hasp and the inside has a drop bar and two brackets that hold a 2x4 to hold the door closed while your inside.

The first thing I did was through away the mattress and mopped the floor real well with a commercial floor cleaner. There's no heater, no stove, no fridge. There is an old Honda Generator on the back bumper but I'm not sure if it runs or not.

The only obvious rust I see is on one cross member up front, which is nearly gone completely but the rest look fine.

I figure the first thing inside is to clean up the bathroom and flush out the tank real good. Chances are its not empty and may not have been for a long time.

I'm not sure what to do about the lack of brakes but as an empty trailer it didn't tow or stop bad at all. My pop up pushes my car around more than this thing does.

What did these use for a door latch? The door has no latch hole or catches at all, just the surface mounted lock hasp with a twist lock and key. From inside I see no signs of any lock or former hardware?

There is no inside wiring,no lights at all other than a dome light in the front, and one in the bathroom on the back wall. There's a series of 120v outlets added here and there but their surface mounted with BX cable running from the shore power lead to each quad outlet.
Right now its painted army green with a tan color roof. Most of the paint is peeling off the aluminum and it looks pretty bad but it does have that old time look. I don't want to make it fancy, I want it to look old, but not run down. I do want it to be clean though.