The Falcon 50 is a wonderful airplane. Keep in mind, though, that they are getting old and having various age-related problems-- corrosion, especially.
If your principal can swing the up-front cost, an alternative to the 50 could be a new Citation Sovereign-- similar size cabin, slightly shorter range, slightly slower, but much cheaper to operate. The Sovereign was designed to do anything an 800XP can do, and do it better. Something to think about, anyway.
If your principal can swing the up-front cost, an alternative to the 50 could be a new Citation Sovereign-- similar size cabin, slightly shorter range, slightly slower, but much cheaper to operate. The Sovereign was designed to do anything an 800XP can do, and do it better. Something to think about, anyway.