I don't really understand what you guys mean by "orchestra" vs "electronic". Do you guys mean live instrumentation vs samples? Plenty of games these use high quality samples without hiring an entire symphony and you probably can't even tell the difference.
That was made by one guy. It sounds great right? But if the music for this is like Banjo-Kazooie, it won't be nearly that involved. Live instrumentation should be easy. They'd probably only need a few people.... or one multitalented guy. I'd love to see a collaboration with . He's done some incredible covers of David Wise, Grant Kirkhope and many others, all by himself.