Automatically load obj to Maya

I would like to batch render 1000 models using Maya. I have set up a Maya scene and I need to render these models one-by-one with the same scene

I am thinking of writing a MEL script that does the following thing: (1) Load a model obj (2) Render it (3) Replace the current obj by the next obj, render it and repeat

Can someone give me some hint how to do it? I am not familiar with MEL. Thanks!