Saving 80,000 Gold in Another World for My Retirement 6

There's no way a brand new, 18-year-old viscountess with no retainers will be able to manage her new territory all by herself. So first, she must secure human resources from among those she trusts in the other world! That said, one can't do much without proper funds, materials, or technology. But since Mitsuha even has the internet at her disposal, she'll move forward one step at a time with the help of her appointed vassals. Plus, it's time for the secret of Mitsuha's world-jumping to be revealed! But with all this work to do...when exactly will Mitsuha be able to earn gold for her retirement?!