Your friend may have clipped that many feathers if his 'tiel could still fly with just five clipped ('tiels are amazingly powerful flyers). It's best to begin with just the five and adjust if needed.
When you clip the secondary feathers, you take away their ability to glide down safely. The primary feathers generally provide the lift and that's what you want to prevent to keep them from flying.
Our IRNs only have their primaries cut and can glide straight out and down but not fly up.
I'm not sure, in your part of the world, when breeding season is. It may be that breeders don't have any chicks at this time. Contact a breeder and ask, if possible, when they expect to have babies availible. If you want a young bird, you can always wait. ^_^
And no, six months isn't very long, but as was stated it could take years. Some birds will never progress beyond step-up (meaning no petting/kissing/etc.). And some have developed the habit of screaming. Some may never progress even to taking food from your hand.
You have to evaluate your life and decide if that's enough for you from a bird. Decide if you can handle having a bird that just sits on it's cage and only interacts with you through words and whistles and calls- for the remaining twenty years of his or her life.
But some birds already come touchable and just need a good home. So it really depends.
