Board Thread:Questions and Answers/@comment-99.46.23.44-20131111172542/@comment-16254052-20131112223654

Best way to make coins depends on your strengths. Java-boy there is a great shot, good at picking off targets, so he does best in sniper type missions. I'm better at racing, so I got the Black Steam Horse & can make a pile by redoing the Los Arcos Race. Once you finish the last level of it, you can just keep repeating it. Pays about 850 coins every 90 seconds.

Find a mission that plays to your skills, then just grind away repeating it until you've got a pile of coins.