Shipping a toilet is mildly controversial. I've ordered 2 Toto Drakes over the Internet, both were shipped by FedEx (free shipping), both arrived in fine shape, were installed by an amateur (me), and are working fine. Terry has had some bad experiences shipping toilets.
Read the threads here about the Cadet 3; it looks to me to be a gamble, but one whose odds are improving (in your favor). If your plumber is really good, inspects the toilet on delivery for weird defects that people have talked about, and installs it carefully, you should be OK.
Whatever you get, I wholeheartedly recommend ADA, "right-height", or "comfort-height" bowls, senior citizen or not, and be sure to put in the blocking for grab bars when you build the walls. We did all that in both our baths, and am not too proud to say I love the height and the grab bars, although I don't yet qualify for a handicapped parking sticker.