Mystery net is a rip-off, don't spend 5 diamonds for it, you will catch 3 common fish (same as the normal net) and a panel or plank, ... gee! About lobster deal, 2 hrs to make a trap, 5 hrs to catch a lobster in the lake (when it is done, click on it, the lobster will be transferred to the lobster pond, start getting cooked for another 5 hrs, when the cooking is done, you need to use a scoop there to scoop the lobster tail out, it goes to your barn for storage (check there you see it) and don't worry about the lobster swimming back to the lake, they just make the scene for fun. Then 2 more hrs with 2 lobster tails for a bowl of lobster soup.Yes, use Tom, if you can use him every 2hrs (plus some extra time you miss) for half a day, you can fetch at least 45 bowls of lobster soup. Btw, you can only place two lobsters in the pond for cooking at the same time, if you want more capacity, you need to upgrade the pond for 40k coins for the 1st upgrade.