Lots of folks do use as house plants just for the vines. They don't try
to pot them, just stand the sweet potato in a jar of water and let the
vines do their thing.
A sweet potato is a modified root, entirely different from an Irish
potato. It is a hot weather plant, so if you want to grow sweet
potatoes, you will need the slips in spring. Even cuttings of the vine
will work. They are incredibly tough in hot weather.but can't stand any
cold.