The 3rd area is the best to do this since it's one of the easiest areas. The first area is the tax guy so you can't do it there. The second area is pretty tough and you'll need your acorns to spend. So the 3rd area is the best IMO. Spend only a little money here and there, you need to finish the match with having 1000 or more.
Check out my video for tips on how to play