Here's the simple set-up I use. It costs about $40. It won't handle many things above 1/48th scale however.
It is quick and simple to set up and folds away and can fit behind a work bench.
I'm a pro photographer and made my living from imaging for almost 40 years. While I have access to a very good studio, transporting models was more of a hassle than acquiring this simple rig.
Set ups like this allow you to get the diffused lighting you need and with a few simple camera techniques any one can start taking good shots of their work.
I recommend something like this. A decent photo of a good model is better than a bad photo of a great model.