IMHO, every breed of dog has the potential to be VERY expensive. My last dog was a Westie and in the last year of her life I paid over $8,000 to Cornell for the best treatment available. With Sadie, I have spent at least $1,000 dollars on healthcare and essentials needed to raise a Yorkie - and she's only 9 months old!!!
Owning a dog is DEFINITELY not for the faint of pocketbook.....