So if I understood it correctly the knight lady got pressured into accepting a dilapidated territory after the other, more savvy heroes, refused. The king presumably wants the heroes to spend their own money rebuilding the territory, thus injecting gold into the kingdom's economy. Because they're her friends and they saved the world together, they agreed to help her for at least one year. Then during the night, they all had similar dreams where a god offered rewards, and the MC for some reason, even though he was perfectly aware of the mess they were in, didn't wish for anything. One of the other heroes however wished for a castle, and so the god created a massive castle for them.
Which raises the question, why would the MC not request anything else that could help with managing the territory? Why would he tell god he's fine, when right before he was complaining about all their problems?