I'm looking for a highly knowledgeable and experienced real estate agent who can help me find my dream home in Istanbul. I'm interested in a single-story family house with at least 4 bedrooms, 3 bathrooms, and a spacious backyard. My budget is around $500,000, and I'd like to be located in a neighborhood that's within walking distance to schools, parks, and public transportation. Please consider factors such as the property's energy efficiency, noise pollution, and potential for renovation or expansion. I'd also like to know about any local amenities, such as grocery stores, restaurants, and healthcare facilities, that may be nearby. Can you also provide me with some recommendations for reputable contractors and designers who can help me with any renovations or decor ideas?