I recall having one budgie. He was an acrobat in the air! And that was the exact reason I purchased him! But I was stupid. I clipped his wings. I wasn't thinking straight, let alone right, and thought he might starve to death shortly after getting him.
Well, he lost muscle mass. He could no longer fly (he could still land without hurting himself! just couldn't fly) and when he finally got his flights back in, he still couldn't make it more than 4-6" off the ground, *AT BEST*.
I had to "teach" him how to fly again by tossing him onto a bed at least 2-3 times a day for around two weeks. After this time period, he was able to fly again, but he was no longer that graceful, acrobatic bird that I had purchased.
Gulfstream, Crusso may be able to find his way home *IF* he is familiar with the outside of your home and it's surroundings. However, like others, I do not recommend taking him outside unrestrained! Please, either keep him in a cage or harness train him!
If you refuse to do this, then I strongly urge you to take Chris Biro's Skype class! It's a minimum of $100 for up to 90 minutes of talking with him, or $300 for the class which is 5 sessions long. (I recommend the class, btw)
Avian Training and Flight Instruction | Register For a Class | LibertyWings.com
If you don't do any of that, then you may very well lose Crusso!