How many martial arts should i take to compliment jjj and mauy thai?

i am 13 have a big budget for mma training from my paper round i also do kickboxing mauy thai jjj i have just started judo another martial art i have 30 pound a week and have enough for one more cl . my mma school is litrallu 30 seconds fom my house and i want to be a pro . how do i become a pro ? i do well in school so i have a fall back thanks