We yes ofc it is actually

But it wouldn't be legal to "sell" that mod

You can pay some one for anything you like

I wasn't planning on ever selling a mod. If I did pay someone to make a mod I would credit the creator, and it will be free to download.

The title says it all. I was thinking of making a mod request that someone could make and I will pay them for it but I'm not sure if that is against the forum rules or even against copyright laws?