Depends on your definition of profitable. Several points - the Amish live a 17th century lifestyle, BUT with some 21st century benefits, like modern medicine, good roads, etc. Not saying that’s a bad thing; just pointing out that they are willing to live what for many if not most of us would be an unforgivingly hard lifestyle, and they do have modernity to fall back on if there are problems.
“the Amish live a 17th century lifestyle,”
Explain what the 17th century (1600’s) was like, I can’t get the picture.