I see a lot of advice to "sell all building materials" ??!! WHAT?! This game is ALL about money and the way to increase your money is to increase your farm i.e. build it up! I NEVER sell any building materials. Have you seen how many pieces of material is needed to upgrade your barn or silo? Sometimes dozens of each to upgrade. The way to make money is to have plenty of inventory room to store what you can sell. Plenty of people sell items too low. I scoop them up and resell them for a profit. I make plenty of coin on filling my boat orders and other boat orders. Also, you get vouchers. Last week for Valentine's day, the boat orders were TRIPLE! There is nothing more frustrating than not having enough room in your silo or barn to buy good stuff or underpriced items. More inventory = more room to store what you buy or manufacture = PROFIT!