We've had several Basenji puppies over the years and I will say that having a two at a time has made all the difference. Dogs are pack animals and get mental stimulation, exercise, and companionship from a second dog. Even if the dog isn't a Basenji, your present dog will get much enjoyment from a companion and take less of its boredom and anxiety out on your belongings.
(We have 3 Bs at the moment: one 14 year old female and two 1 year old brothers.)