Nope, sounds like a scam. Puppies don''t come trained, some older dogs may come with very little training, but if no one continues to enforce that training and fails to provide sufficient daily minimal walk/elimination times outside, every 3-4 hours you will come home to a houseful of crap.
If pets aren't allowed where you live you can't get one, period. A therapy dog is nothing more than a pet, and you would be purchasing it, as well as be training it for to visit nursing homes, if invited by the establishment and must pass a good citizen test.
If you work such long hours, you won't have the time to train it or have it tested or take it to nursing homes/hospices, etc.
Neither of these dogs are a breed either, just more poorly bred mixes, that maybe genetically deficient, resulting poor temperament, requiring an experienced/knowledgeable owner to handle it, which obviously you don't appear to be one....