When purchasing a cage for the bird, you should really buy the largest possible that you can afford. Bar spacing is very important because a small bird may get stuck in the bars of a cage with wide-spaced bars. This is the cage I have my little bird in- [link
http://www.animalenvironments.com/barcelona.html]http://www.animalenvironments.com/barcelona.html[/link]. It was a lot cheaper 6 years ago! LOL There are also pretty inexpensive, good quality cages on ebay.
As far as training, no classes! But birds are a lot like dogs in a way. They are flock animals, and there is a pecking order. You want to be at the top of this pecking order. Parrots should never be allowed to sit on your shoulder or head. The top branches are reserved for the top bird, and that should be you. Parrots like to be in your company. When they are misbehaving, the best thing to do is isolate them. Some use a time out cage. By scolding or yelling, the parrot gets what it wants- attention. If the bird bites you, and you scold, he will do it again because he got attention. If the bird bites you, and you quickly put him alone in a time out area, he will learn that a bite= isolation. One must also remember that these birds are not domesticated animals. They will bite, scream, throw food everywhere. That's what parrots do. You can only train so much out of the bird.
Parrotlets and tiels make great starter birds because they are not as intimidating as a larger bird. They are quieter, less messy, less destructive. Cockatiels are very mild mannered. Parrotlets are very feisty- more like a large parrot, but easier to deal with because of their small size.
Cons- Screaming, mess, require a lot of care, avian vets are expensive. Feeding takes a while- birds should not eat bird seed alone. It's like a child living on candy. I have to cut fruit and vegetables every morning for the birds. I feed them 12 grain bread for lunch, and they get leftovers for dinner- whatever we eat: rice, chicken, veggies, etc. I leave a pelleted diet in the cage dish. Seed should be given only as a treat. It takes me more time for me to care for the birds than the dogs.
Pros- Entertaining, affectionate, beautiful, smart, silly. A lot of the same pros I would say for my dogs.
We've been lucky in that I have not had to make a big move with the birds. We've been in San Diego for seven years, and I started getting the birds six years ago. I would image that a long drive would be stressful on the birds, but they would make it. They can fly under the seats during air travel. Some parrots (like Quakers) are illegal in some states, so that should be researched before any purchase/adoption. The West Nile Virus has made travel with birds a little more difficult., so I suppose you would have to look into state travel restrictions.
There are two parrot rescue organizations here in SD. They require that future adopters take their bird care classes. Those wishing to adopt the smaller species take fewer classes (3, I think). They also require home visits. I haven't dealt with either personally. I bought two of my birds, and I found my tiel in someone's trash on trash pick-up day. Some people!
If you do get a parrot through one of these organizations, I would try to get one whose owner has moved or died. Problem birds can be very difficult, and you may never have a tame well-adjusted pet.
Though I am all for adoption, I would get my next bird from a breeder or a quality bird store. Hand taming parrots take a lot of time and money. After the bird is hatched, it is removed from its mother and hand fed every few hours. Hand fed birds make the best pets because they see humans as their own kind. They make much better pets than the birds you may find at Petco or may find at a rescue. It's pretty much the same thing as dogs- you should buy birds from a quality breeder or bird store.
Problem birds can make your life hell- they can be mistrusting and vicious, they can be feather pickers, they can scream nonstop all day long. So it's really important to either get your bird from a good source, or if adopting, make sure that you and the bird are a good match.