Len aka Redial
I have had Basenjis since 1973, and done the apprenticeships of handling, showing, stewarding, and since 1990 judging hounds. I have four at home, one of each colour, and two boys and two girls. I am no longer breeding, but I have learnt a lot from my Bs.
Go to the Zande website, and included there are some material about getting a Basenji, or not. It does not sound like your environment is right for a Basenji. The temperature upto 34C is okay, but after that they start looking for shade and the cooler spots. When it is hot here, above 40C, the older girl I have will walk, but when there is some shade she will lay down until she is ready before moving on. They are in control, and let you pamper to their needs, but they are definitely trainable.
I would pick him as having some B in him, but not all of him. Please learn to Dremel his nails, as they can cause his feet to splay. If you can hear clicking when he walks on a hard floor, that is time to get the Dremel to work. he looks a grand dog, and seeing that he is likely to be half labrador, then get him into obedience. He should be great at being an interesting dog.
get into the habit of knowing the signs, and get into a routine. When they first wake up, boot (not literally) them outside, and praise them when they go. Take them for regular walks, it is for their enjoyment, not yours. They will get into the routine of pooping and piddling outside on their walks (make sure you pick up the dogs logs). Dogs love routine! Make sure they go outside after a meal, and watch them.