True, dog sizes can vary quite a lot, but if you’re looking for a small dog, you’ll want a Pomeranian, Yorkshire terrier, Shih Tzu, pug, chihuahua, Lhasa Apso, Pekingese, or miniature schnauzer.
assitant
Smaller dogs cost less than bigger dogs, like you said. That’s because they’re easier to raise: they cost less in food, and their veterinary bills are lower.
assistant
Should I get a big or a small dog?
user
Dog size is totally a matter of preference, they’re all great pets.  But I have one observation that may help you make your decision:  smaller dogs have more energy and are a better fit for people who want to run outside with them frequently, and don’t have a lot of space in their houses.  They’re also usually less expensive to buy.  If you want to go for something bigger, you can look into huskies or malamutes, but those are larger and have more energy as well.
assistant
I'm not sure about smaller dogs being cheaper. It depends on the breed.
user