Professional Image Enhancement for Large Print

I need a low-quality iPhone image transformed into a high-resolution professional image suitable for large print (over 16x20 inches). The final image will be used to hang in my house. Requirements: -... (Budget: $30 - $250 USD, Jobs: Adobe Photoshop, Digital Art, Graphic Design, Image Consultation, Image Processing, Image Upscaling, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)