The first card we have is The Sun reversed, which means there is no chance of a significant change in your uncle's financial situation. The second card, reversed Four of Cups, indicates that your uncle must be ready to face his financial problems and can no longer avoid facing them. This means that while he cannot radically change his situation, he can still do his best to improve it with his skills and responsibilities.
The reversed The Sun card also shows that your uncle's financial situation is difficult to change. He must go on with his present condition, and strive to bring about the desired improvements through perseverance and the use of his skills.
The last card, Seven of Wands, indicates that your uncle may not be aware of all the possible opportunities available to him to improve his financial situation. It also means that he can research new ways to manage his finances and find solutions to his difficulties.
Bottom line, your uncle is likely to have some chance of getting an improvement in his financial situation, even though it may be difficult to achieve. He may try to use his skills and responsibilities to do so, but he will also need to be aware of the possible opportunities available to him to improve his financial situation. So, the answer to the question is: Yes, your uncle has some chance of getting an improvement in his financial situation.