Trailer build advice and ideas please.

[BigRAWesty]

So I think the first thing you need to do is work out your sides.
To save heaps of fab time (and depending on how high you want to go) a simple C section purling may be a simple cut to size and bolt on option.
If not some plate strips to suit new height and angle iron welded on to give the folded edge look..

Next will you want tailgate mounted kitchen or something that slides out.

If tailgate mounted you'll need to cut off and move hinges so it swings from the side.
But also will the extension piece be ok or is a new tailgate needed??

Then how fancy do you want the kitchen??
http://www.ebay.com.au/itm/171368597021?nav=SEARCH

There are cheaper but that's the first I found.
And if you plan on mounting the kitchen and spare on the tail gate you'll need some serious hinges, dam near a rod and tube setup and something just as good to secure on the other end.

If your happy to stick the spare under the trailer a simple flat bar hanger could be made and a couple of chain links make a simple hinge and lock setup cheap.

Draw bar is simple.
100x50x5mm minimum.
Personally I always start the draw bar as close to the front spring hanger as possible.
That's as strong as it's going to get.
Then just make it to suit the length you want.
Run a string line down the guts of the body so the tow point is dead centre.

How much steel do you have and what sizes?? This will really determine what you do.