As a mixed third generation immigrant, I get this a lot. In my experience, most people want to know my ethnicity, but for some reason they never ask me that directly.
No way. Imagine being stuck in complete darkness unable to move your body for that amount of time. I'd lose my mind and probably have a panic attack thinking to myself what if they don't dig me up?. The money isn't worth the mental trauma that would cause me.
I'm not sure if that would be considered well travelled from a European perspective. For example if you live in the Netherlands, you could drive to Germany, Belgium, Luxembourg and France all within 3-5 hours. A quick Google says the average European visits 8 countries within their lifetime.
Geographical proximity and culturally dissimilarity definitely need to be considered.
Yeah, messed up the formatting. I've edited the original comment. Thanks.