Budgies don't warble like canaries but they can be just as noisy! They tend to sing and chat to themselves and occasionally they start squawking if the mood takes them. They are very gregarious birds so if you are out a lot of the time it might get lonely. You could always leave a radio on - I used to do this if I was going to be out a lot. Mine used to start yelling when I was trying to watch the TV but to be honest you learn to ignore the noise after a while. They also need exercise so it's best if you can let it out for a fly round (not when the cat is in the room!) I don't know about feed - they do need certain nutrients.