Yippie another potential basenji owner!
That being said kudos to you for doing the research on whether a b would fit your family! From my own experience owning a b, some of what a "basenji needs" can really vary with age. If you are looking at an older b, that has pros and cons. My own guy definitely slowed down around 8 to 9. Before that, 2 to 3 walks, toy time, training time or thinking toys were essential or he got into trouble. Luckily for me, he mostly just overturned laundry baskets and hid the items all over the house. Once older, he has been fine with 1 or 2 walks and a little play time/brain time. If I can do more, we do but he's a lot more patient. He has also never figured out chain link fence, but I have seen others who have. My guy figured out how to use the rotating rack inside an entertainment center cabinet to get out the squishy VCR boxes he liked to try to chew. They each learn nasty tricks in their own way.
That said, older dogs are a bit more set in their ways. I could never get him to not sleep with me at night now and he has never met a cat he couldn't chase. Took on a 35 lb Maine coon cat without batting an eye.
You'll definitely want to have some trial time in your home to see how he/she fits with the other animals. I would check on here and with AKC chapter near you for local breeders. They may have know of dogs retiring or BRAT fosters in the area plus breeders usually want the dog back if it doesn't work out. There's lots of really knowledge breeders and BRAT folks on this forum - just ask!