I don't think you're going to find too many Coton De Tulear owners.. They're extremely rare.
Urbanskidogs, $900 is dirt cheap for a Coton. They typically sell for $1500+.
You should talk to your mom about dogs some more, and better educate her. True, puppies are more work than grown dogs.
However, if you consider caring for a dog to be "work" then you probably shouldn't own one.