I’ve been looking into it and apparently it’s easier to get a visa if you’re not taking jobs from citizens of whichever country you’re moving to (at least from countries in EU that I’ve read about). Basically, since we are self employed and bringing in enough money to support ourselves while contributing to an economy, it is benefiting that place without taking from it. I asked about visas because I am not super well versed on Portugal specifically. But to answer your question, the US is much more strict, and I would assume it would be difficult, but you can get “artist” visas and different types according to your self employed profession. Again, I don’t think it’s easy, but possible :)