If they raise $100K, that's starting to get into the range of reasonable contracts to have great orchestras record one or two symphonies with named-above-the-orchestra conductors. Bear in mind that even a small chamber orchestra (sufficient for Beethoven, but not going to cut it for later romantic era works) is going to have at least 35 musicians. Each of them will have to be paid for both rehearsal time (alone and as a group) and actual recording sessions. On top of that, a recording session isn't just a play-it-once-and-we're done affair. A forty-minute symphony will take at the very least six hours in the studio, and frequently if will take more than that (Glenn Gould was notorious for recording less than ten minutes of final product per day, but that's an extreme case). Without getting into technical personal, we're talking many hundreds of man-hours per symphony. Add to that studio costs, instrument transportation, engineers, and all the other costs of recording, we're talking over $50K just paying union rates. Bear in mind that this is just for one symphony and for basic performers at union scales. Big names will carry correspondingly higher costs.