Raven, the dream about your uncle and his house is quite symbolic and may reflect your current emotional state and life perceptions. Engaging with a deceased relative in a dream might signify unresolved feelings or thoughts regarding that person. Since your uncle never liked you, this could symbolize a part of yourself or your life you feel is not accepting you or something you're not reconciled with.
Photographing his house suggests a desire to capture or understand aspects of your past or heritage. Maybe you're trying to come to terms with or preserve memories related to your family history, even if they weren't entirely positive. The fact that the house is potentially being sold might represent change or transition; something from your past is moving on or changing form in your life.
The beautiful but messy kitchen could be a metaphor for how you perceive your own life: full of potential (elegance and beauty) but currently cluttered with issues or problems (mess and groceries). Your attempt to clean before photographing might imply your efforts to tidy up your life, to make sense of the chaos, or to present a certain image to others despite underlying turmoil.
The frustration of not capturing a good picture despite the kitchen's beauty reveals a sense of dissatisfaction or failure. It may be that you're striving for a certain level of perfection or acknowledgment in your life but feel hindered by persistent obstacles or personal shortcomings.
Remember, the intensity of emotions and the presence of negative feelings can greatly influence the impact of a dream. Since you did not experience this dream as a nightmare and the emotions level was neutral, it seems this dream might be more reflective in nature rather than distressing. It's an invitation to look at both the beauty and disorder within your life and possibly consider how you may reconcile with your past and clear the way for a more orderly and pleasing future.