Romania, some major city that's not the capital. The outskirts of Cluj are perfect, maybe Sibiu or Brasov.
Access to all sorts of nature and activities, affordable housing (big apartments, could even find a nice detached house for less than $500), great food from around Europe, great selection of restaurants/fast food, easy access to the rest of Europe and the world, lovely people who will speak English enthusiastically (maybe not that well though) and of course great Internet for very cheap.
$1000/mo without paying local taxes is enough for all of the above.
In the cities, crime is very low if you're worried (the criminals moved west lol), bureaucracy is on par with Germany (OK that means it's shit), corruption is very low. Whole damn country is a hidden jewel of Europe. Just maybe not that affordable to locals heh.