The first card is The Sun reversed, indicating that John's chosen solution may not be a wise choice and John may not have considered all possible scenarios. This means that John should be cautious and consider alternative options.
The second card is The World, which indicates that there are other options available to John when it comes to real estate investments. The card suggests that John should explore all possibilities to make sure he is making the right choice.
The last card is The Moon, which represents Gianni's decision-making process. The charter suggests that John should consider all financial aspects related to real estate investing, such as purchase costs, taxes, management fees and so on. Furthermore, he should also do thorough research on the local situation, so as to ensure that he chooses a profitable investment.
In conclusion, based on the three cards, I think John should consider all possible options regarding real estate investments and do thorough research before making a decision. If he makes sure he does these things, then he can be reasonably sure that he's making a good investment. Therefore, answering the question, I would say YES; your friend Gianni has made a good decision to invest in real estate.