Marky Mark-san
このよにいるみんなとBushの両立は大変だ!doesn't sound natural.
両立 is used when you mention that you manage to carry on 2 different works.
For expample, as タグッティー☆-san said above
仕事(work) & 勉強(study),
家事(housework) & 仕事(work),
勉強(study)&趣味(hobby),
勉強(study)&部活(club) etc...