If you are pro yes, is necessary. 40.000$ is not enough money to pay someone their salary and cover travel expenses. Plus you need to pay a sh*tload of money on airports extra baggage for the stringing machine.
And there's few pros that can afford 40.000$ year to someone to take care of their racquets, and P1 are best, so thinking wisely P1 has a great performance/cost relation.
3x Tecnifibre TFight 295 VO2MAX (6g at 3 | 6g at 9); TW Leather Grip;
My custom paintjob thread: bit.ly/17pQqt0