OKC doesn't support that in the sidebar, but supposing it did, that would be... peculiar, but considerably better than leaving it blank. I might ask in a message (if the profile otherwise passed muster) why a description was provided in lieu of a number (unless, hypothetically, descriptions rather than numbers were customary), but as descriptions go it would be very promising.

Just for another data point: As someone who also stated a preference for having that information available, I would find this sufficient. The description would have to be pretty specific, though--the idea is to get a sense of what kind of lifestyle the person's finances permit.