As you see here, owner Drayton McLane got his wish to keep all the ticket revenue from the game in Milwaukee:

According to a source familiar with the intense negotiations between Major League Baseball and the teams involved, the Astros will receive the ticket revenue from the games at Miller Park.

Even though the Astros get the revenues from the games, they insisted on wearing their road uniforms and sitting in the visitors dugout in Milwaukee. Today, the Houston Chronicle quoted McLane as saying that the Astros had no choice but to play in Milwaukee. Chronicle sportswriter Richard Justice called the decision to play in Milwaukee "beyond ridiculous" and then wrote that if the Astros miss the playoffs by a game, they will "remember this one". He mentioned that the mood of the Astros players went from "angry to very angry" and then quoted Oswalt as saying: "We’re the only team in baseball that’s going to play 83 road games." Yet, in the same article Justice wrote that:

He [McLane] refused to believe predictions that a monstrous storm was headed for Houston. He wanted those three home games against the Chicago Cubs so badly that his judgment was clouded. Had he acted earlier, had he acknowledged that the Astros and Cubs simply weren’t going to play at Minute Maid Park, this series could have been played at a true neutral site over the weekend.