As a general thing, I think they advise that you get only one budgie/parakeet, the idea being that the single will transfer its social needs to you rather than to its peer or mate. On the other hand, I have had some very tame budgies even when I had six of them.

I had a couple of cages for them. One was a large one on wheels, the other was a wedge-shaped one I built to take them outdoors on warm days. I would set the cage on its face on the fresh grass and let them have at it. My dog at that time was charmed by them and would lie beside them for hours.

Incidentally I think it is the male budgie that is considered easier to tame. (The way to tell them apart, as you may know, is that the male has blue/blueish colored patches on either side of his beak, the female's is usually beige.)

I can attest from experience that a female has a vigorous bite. :)

Budgies tend not to breed if there are only two of them; evidently a flock stimulates the breeding bond. I have a friend who has a chaotic aviary; in addition to finches, lovebirds, grass parrot, cockatoo, and cockatiel she has about a dozen budgies, and is getting babies all the time.

She admits she has enough of them but says she doesn't like the idea of robbing them of their eggs.