I have a toy fox terrier. He is a mix of a fox terrier and a chiahuhua. (spelled?)
He is about 7 pounds, very cute and a one person dog. He doesnt need a lot of maintenance because he is short haired and also doesnt need to be out much. He hates to be out at all in the winter, he freezes.
I paid only 200 for him and he was well worth it. I wanted a teacup chiahuhua, but they are like WAY expensive and I looked everywhere for one cheaper and not much luck. I wouldnt trade my dog in the world for any other dog. Hes adorable, loves to be with me whereever I go and loves to cuddle. He sleeps under the covers in my bed. He also loves my 2 cats and loves my parents dogs.
I would suggest anyone wanting a small dog to look into a toy fox terrier. He is much cheaper to buy and so adorable. Good luck though, on whatever dog you buy. They are all adorable.