Definitely verify everything directly with the actual government websites because that stuff gets updated constantly and half the blog posts out there are from 2024 giving you outdated requirements. The visa itself is just one piece though - I'd actually care more about whether the country has reliable internet (seriously test it beforehand if possible), what your tax situation looks like as a US remote worker, and whether the cost of living actually makes sense for your budget, since some popular nomad visas are in places where "cheap" is relative and the internet infrastructure is sketchy. Portugal and Spain get the hype but they're not cheap anymore, so I'd cross-check whether somewhere like Mexico, Colombia, or even Estonia might give you better value plus decent infrastructure without the visa being some bureaucratic nightmare.