Total posts : 45366
As far as the FCC is concerned, there’s no problem with airing commercials or otherwise accepting funding for your Part15 station.
If your going to run your station as a business, then it will most likely be considered as a business, which usually requires some form of a local business license. –Not a “radio license”, but just a basic business license.
The most likely classification of which would probably fall under “entertainment”, for example the same kind of license a kereoke or a bar dj (or even a jutebox) would be required to have.
Now if your just going to be accepting “donations”… I’ve not really researched that, but I think you’d be just fine with that… you wouldn’t need to apply for any legal permissions at all… at least I doubt that you would have to…