Make your mod, put it up for download, smack a Donate button under it.
I can guarantee you that people will donate if it's obvious a lot of time and resources went into your project. Combine that with Adfly and there you go. You can buy new sneakers in no time.

Discussing this further is pointless, thanks to an insurmountable difference in opinions. But I can guarantee you that even if Larian only had half a brain, they'd never allow mods to be sold for money and they sure wouldn't participate and earn money in/with a business like that. No self-respecting company would.