This is tough

Stagnation in productivity is a real bottleneck in raising them. First, prioritize breeding higher-ranked pigs and systematically upgrading your facilities. I'm truly sorry about the previous check-in reward issue. This time, let's focus on efficient feed management and work together towards improvement.

How about increasing productivity first, then recruiting investors? Your bait rank increases at 30, 100, and 300. Raising your bait rank significantly boosts productivity, which in turn increases the amount you receive from investments. This is especially true for 100 and 300. After completing a round, collect your investment, buy the 'bait that can be bought with that amount' for 300 first, then buy the specified bait and premium bait. This will nicely increase the amount you receive next time.