Haha, “professional tenant” can mean something else entirely, something that we Do Not Want(tm).
Question is, would a clean, well-maintained 1925 house necessarily be a deal-breaker in North Park? I’d imagine that there’s a certain crowd who lives there to whom “cute cottage” would be a selling point.
All this being said, a dear friend of mine (the one who initially introduced me to the charms of SD), was renting a 1920s or 30s back cottage in PB. Super clean, smart as hell, professional — probably would be a great tenant, so at least in one example, someone found a great tenant for an old house!