Ask HN: freelance/self-employed/startup visas by country?

Context: I'm a US citizen and developer interested in living in Europe and freelancing for a global client base. I have found mentions of programs in Sweden, Germany, etc.

I’m assembling a list (https://airtable.com/shrmNwymDiSsLCbAg/tblhYTLAEMfzEKgUc) for personal reference that also includes links to public experiences of previous applicants and various service providers. I wanted to check with the community to ensure I'm not duplicating something that already exists before investing more effort.

The requirements for these visas seem to overlap across nations so I am also exploring the feasibility of developing a "Common App" for myself to facilitate applying to multiple countries without having to re-enter information. I’m also considering developing a concierge service to smooth the process for others if there is interest.

If someone has already built this, would like to collaborate, or otherwise has any thoughts or experiences they would like to share, I'd love to hear about all of that as well.