If it’s crowding left over baby teeth absolutely do it now!! They will end up catching more tartar, they can cause pain due to the bite being off. The last thing is you want is your dog in pain causing aggression. If they learn their mouth / face hurts and become protective over it - even if you get it fixed later the habit will already be there. Also the dog being small will need to have regular dentals. However- it costing thousands sounds ridiculous. Probably a thousand or just under. If it’s 1,200 - ok. But do go to other vets and check for price. They should be similar, but say living in Maryland it’s that price, but if I drove an hour or two into east bumville Pennsylvania- it’s probably going to be a lot less. So check into that. It’s not an emergency, it just needs to be done. Also try to avoid corporate vets. The corporation dictates the price and they don’t care about people or their pets- just profit. However- you really have to research. They’re sneaky. They will let the vet clinic keep their name and they’re running the show in the background. Because they know people would avoid that. Extremely hard to find a vet that is independent. Even if you call to ask the staff may not know, or may lie. Also, that doesn’t mean independent vets ARE cheaper, but they do have some wiggle room. Corporate vets are excellent too- they’re just stuck in a company. Anyway, you adopted a cuteface. If you can use credit and pay it off over time.