I just dont have time to finish this. 
When I bought it, it was this long (24'). 

It has been shortened to 18'. The rear axle was relocated up front. 

What it needs to finish.
-Deck
-Axle Bearings & Brake kits? I had to pull it home with one tire off. One of the brakes was locked up. 
-Rear bumper
Recommended
-I would add more cross members (probably not necessary).
-I would probably also fix the beam at the tongue of the trailer, has a dent in it. 
-Tires
This sucker was long.

These are all I have with me at work.