As a commercial photographer who shoots thousands of small items on a desktop, setting up on a table is really easy, and there are simply so many options. A lot of the time its simply a roll of background paper on a background bar and a couple of stands, but sometimes even just on a C-stand. But a lot depends on what you want and need, because it can get much more complicated, with sheets of Perspex and glass in there and multiple rolls, bounces and flags.
That's the super easy part.
The part where all the skill and experience comes in is in the lighting, along with lots of micro adjustment to bounces and flags. There is no such thing as a lighting setup when it comes to tabletop photography, you need to set the lights up as and how you need them for that one particular shot. I regularly use anywhere between about 1 light to about 6 or 7, and lots of different modifiers, softboxes, reflectors, grids...