i'm not too worried about the battery cost. I mean it is what it is, I knew it would be expensive.
I'm going to try and do something in the range of 48v or more, and at least 13-ish amp hours.
I might even go upwards of 20, but it depends on if I can get a reasonable deal at that voltage.

I'm more concerned with the controller. this hub has all the bells and whistles, and I don't even have a clue about where to start on this.
I was looking around a little bit last night, and realized it might be more work than picking a hub was.