I bought a $1500 trailer and need your help! What should we do with it? Overland trailer build?

In early Feb I bought a $1500 trailer. It was painted a terrible silver colour, had ancient tyres on it and was generally rough. I parked it up in the garage for a month while trying to decide if I should do any work on it or just flick it on.

I broke out the painting rollers (yeah, the paint job is terrible) - installed my "spare" 12V gear into it, replaced the tyres and we took it on a bit of a roadie to Whakatane before Chloe started back at work.

Since we got back, it's been sitting in the garage - and I'm not quite sure what to do next with it?