Tom is a little like an errand boy. You get Tom when you reach level 14. At that point, you get to use him free for the day. Take advantage of that! Then you can pay 15 diamonds to get him for one day. Tom is a great way to make money fast on Hay Day. The game does award diamonds frequently, so hoard those diamonds and get Tom working for you on occasion.
First, when you buy Tom make sure you’re free for the day. You can send Tom to find goods and crops for you every 2 hours, and you want to take advantage of that. You can then get goods cheap from him, and sell those for the highest price at your roadside shop. Go for the most expensive goods you can for your level.
You can do well sending Tom after berries, cherries, and apples. These crops sell high and sell quickly because they take so long to grow. Check your roadside shop to see what goods are the highest priced. Send Tom after those as well, then sell them off in your roadside shop. Don’t sell to visitors to your farm, they don’t pay full price. Utilize the roadside shop instead.
orignal link: https://levelskip.com/simulation/How-to-Make-Money-Fast-on-Hay-Day-3-Great-Tricks