Economical for the teams interms of travel, yes. For the NHRA-as a whole, probably not. You would not draw as many fans to each of the races by putting three races in a row that are with in a 5 hr or so drive so close together. In the end that would hurt the teams too, the sponsors would see that there were not as many butts in the seats. By spreading it out people can afford to go to more races.