I had the same problem, what I did was farm almost all days on Deep Forest Road and sold all drops to build up some gold reserves. Then, on mondays I would run the E/N version of the daily map (the one suitable for my levels), it gives some decent gold just clearing it, with the drops of the golden armor it gets better.

It will take time but I guess those are the best spots to grind for gold at the moment. Still I'd wait for what others have to say about the topic.