I've been playing, am up to level 24, and can't get a nail to save my life! Everything I need to do, increase capacity in my barn and silo, open more spots in my market buildings, and make more selling spots in my shop all take nails. I've only had one since I started the game, and that's because I bought one someone was selling! Please tell me how to get more nails. I'm pretty close to just walking away from this game - it's so frustrating!