Move up or Multitable?

[SuitedSixes]

My vitals after 8800 hands at Party .5/1

+250 BB
2.9 BB/100

I have more than enough BR to support a graduation to $1/$2. I am trying to decide what would be most beneficial for my progress as a player, moving to $1/$2 or learning to multitable at $.50/$1? I don't have dreams of playing professionally, just being able to fill the gaps between contract jobs. Thanks.