The typical mixed-breed dog weighs around 40-60 pounds at full growth. A lot depends on the size and structure of the ancestors of your particular dog. Mixes of small dogs should result in smaller dogs, and mixes of larger dogs should result in larger offspring. It should be remembered that all "full-bred" dogs were once mixes of other breeds.
"Mother Nature" tends to breed for sturdiness, intelligence, playfulness, ability to co-exist with other pets and people and longevity, so we can expect Maleah to be healthy and sturdy. Her long haired coat indicates that she will need regular grooming. Her family intends for her to live indoors, so that shouldn't be any concern.