Easy ways to get gold in game:
1 - Ask for Water - it sells for 25 gold each. so you get 300 gold per +12 water gift
2- Sell adult chickens, dogs, pigs and sheeps. They pay back 2x the price (100% profit).
3- Plant green peppers. 40% profit and get ready in 2 hours.
4- Visit your neigbours and do something there.