How many Gi should i buy?

I have been training in Jujitsu and Judo for around a year now, i'm really dedicated i train 4 times a week and i have already decided to do this for the rest of my life, but i only have 1 Gi and its all dirty and covered in sweat allot and its starting to shrink since i have to wash it alot so i was wondering if i should buy another 3 or 4 Gi to get used to the differant brands. The companys that i currently am thinking about are Toraki, Fushida, Adidas, Mizuno and maybe Blitz sport