The only good option I could think of to do this is to utilize the DAFT between the Netherlands and the US. Pretty much every European country has a self-employment visa/permit with lax requirements though – usually they only require you have like 10-20K€ stored in a government bank account that you aren't allowed to withdraw from.
An issue with this is that, on such visas, you have to have your own private insurance and can't rely on the government's welfare/social safety whatsoever, or else your visa won't get renewed. Of course the healthcare will still be affordable unlike in the US, but it's something to keep in mind.
An added bonus to doing it in the Netherlands is you won't run into many people who can't speak English well. Obviously if you're moving somewhere else, you should use the primary languages spoken there and not just talk to everyone in English, but it can't hurt to be able to use English when your Dutch skills are lacking, especially if your customers are primarily English-speaking or if you want to hire the people who live there.