I wouldnt even consider buying work so far away unless you considered relocating. You may think it was fine for the first few months until you get used to earning the money you earn, then you would find the travel a pain. Even although it is supposed to be two days a week, the work may take you 4 days or longer until you get used to doing the work, and finding it in the first place. For the money it will cost it would be better looking for work locally.
Peter