I really don't recommend clipping wings.... and the beak should never be trimmed unless there's a health reason for it (i.e. overgrown beak due to liver failure or a mite infestation) or there's been damage to the beak causing it to grow incorrectly.
Re: Clipping - it's no guarantee that it will prevent your bird from getting lost outside (clipped parrots are actually in more danger outside than flighted parrots!), and clipping removes control of flight. (flighted birds with no experience or those that are frightened are more likely to fly into things than an experienced flighted parrot - but a clipped parrot has no control and can't as easily avoid objects that a flighted bird could!) I do understand the reasons for it, I just don't agree with them. Besides, sounds like a rather large home to 'bird proof'!
That aside, well, it sounds like a great opportunity to start a bond with your new companion! Training can begin from right inside the cage, door closed! You can work on target behaviors, trust behaviors, etc! And as the bird grows accustomed to you and his new environment, you can start allowing him out for short periods of time under supervision! If he's not ready to come out, don't force him out! Just give him time to settle in and learn that everything is ok!
You can find a lot of great information about training under positive reinforcement and clicker training! I love Lara Joseph's blog, Barbara Heidenreich has a good blog and there's also the websites/blogs Learning Parrots, Best In Flock and Cage Free Parrots.
Since the she's been in practice as our towns only avian vet, so she has a LOT of experience. I tried contacting dr. Attila Molnar in calabasas as he's an hour away, out of curiosity, but he doesn't practice right now? 
