Polygon makes a more basic but reasonable build
https://www.polygonbikes.com/product...ssion-ax-disc/
Problem with tandems is they've become stupidly expensive, for something that just has an extra crankset and cockpit they're usually well over twice the price of a similarly equipped bike. With the wife not being a rider, unless you find a used bargain, I wouldn't go much above the polygon unless you know she'll like it. Too much cheaper, and there are cheaper, and you might find the experience is darkened by pushing around overweight, inefficient crap.