At some point...
you have to stop spending money, for things that even work.
Once nearly rented a machine from a rental co. It was used very successfully in motels for things like smoking, but I went with my homemade scent killer.
The smoke damage to an auto got cleared up with a gallon of homemade scent killer. And the $1500 estimate was taken care of. Those are the dollars I enjoy taking care of with minimum cost.