Hello MT, I've got a quick question about accordions.

I'm covering the song Wake Up - Arcade Fire and I'm wondering what type of accordion I should get. I don't want to spend like over $200 on one, but I want something that's useable.

Any idea on the range, amount of bass keys I need, anything? I'm a singer-songwriter type and really want to incorporate it into my music, but nobody I know plays it.
I did an extensive study on button Accordians and they cost $6000+. But I don't know about the other type.