Earning a living making models

[Scourgewarper]

Hi, I was wondering what the general view is of places like turbosquid etc where you can sell your models. I am currently trying to get into the games industry but am very evenly split between 3d modelling and games design. As the two overlap and there's no harm in improving both I wanted to concentrate on my modelling in the next few months and maybe earn a little cash.

I assume making models for commercial use requires them to be upto a certain standard so that would motivate me to concentrate on making decent models etc but what's the general view on this? Is it possible to make much money from it? (that's not my sole aim honest!) I'm kind of using it perhaps as more of an incentive to finish models/projects and motivate me but any feedback will be appreciated.