Budgies can be taught to talk, although not all will. Some will only whistle, while others will learn many words. Hand-raised and single-caged birds are more likely to talk. Relatively inexpensive, they are not loud, do not take up a lot of space and do not make a mess. As with most birds, the budgie will bond quicker to you if it is a single bird.
If you are busy and don't have a lot of time to interact with your bird, consider getting two. These are flock birds, which means they like companionship.
To learn more, read Choosing a Budgie or Parakeet.