You can spend 6 months out of the year (and 90 consecutive days) in the Schengen on an US passport without any special visa, and these other countries usually l

You can spend 6 months out of the year (and 90 consecutive days) in the Schengen on an US passport without any special visa, and these other countries usually let you stay as a tourist for 30 days without a visa, some 3 months. Also Portugal has the Digital Nomad visa for 1 year renewable. That requires employment in the US (or elsewhere outside the EU) so not the same as what my brother was doing but a good option as the min wage requirements are not high; could get by with what would be part time work on a US salary esp in tech.