Polo Bikes

I'm getting that bike I think, minus the forks.
annoyed by the 135mm rear spacing though. Means I need to build a new rear wheel. However correct me if I'm wrong but since I'll get a MTB hub surely I can put two sprockets so I can run a polo gear and a commuting gear? chainline issues?

i have 2 rear sprockets and 2 chainrings so the chainline is matched on either and the rear axle doesn't move much. i think it's 39/18 and 36/21. you could probably do better, those were just the chainrings i had on hand.