I have never placed a puppy in an apartment. Not particularly by design but it just panned out that way. Even the relatively high percentage I have exported have gone to houses with gardens of some kind and access to lots of exercise.
Many of these myths have only really gotten a toe hold since FaceBook and social media generally. I had one potential owner visit a few times before deciding, yes, her allergies did not extend to Basenjis. She had three pups from me over a span of about 15 years before being an established and successful breeder herself.
@rhughes89 Well done for wanting to persevere. I am sure that, with the will and the right mind-set, you will prevail !