The reversed Four of Wands indicates that the subject's mind is confused and unable to make thoughtful decisions. He may be influenced by the opinions of others or by a desire to achieve a short-term goal, without considering the long-term consequences of his choice.
The reversed Ace of Wands suggests that the subject does not have the energy to face this commitment. He may be exhausted and feel that he doesn't have the physical or mental strength to make such an important decision.
The Nine of Wands reversed indicates that the subject's soul is suffering and full of doubts, anxieties and worries. He may be too scared to take this step and may be trying to avoid responsibility for the decision.
Based on the three cards, it appears that you cannot trust Federico with the purchase of your new home. The cards show that his mind is confused, his body is exhausted, and his soul is filled with doubts and worries. The final decision is up to you, but the cards suggest that Federico is not the best person to help you in this task. The answer to your question is therefore: no, you cannot trust Federico with the purchase of your new home.