Been through there couple times, small town in a nice scenic area, ~45 miles west of Cape G, about all I recall. Don't know about the welfare capitol thing... Marble Hill is ~10-15 miles from the border between what I consider the start of the boot hill [flat swampy cotton-growing section] and the end of the SE rolling hills.
Have you checked out the city's web site:
Welcome to City of Marble Hill
The Cape G's online paper:
seMissourian.com
Regional tourism site:
Visit Missouri's River Heritage Region - Southeast Missouri