Ultra-Realistic Holiday Photo Edits

I have between one and five holiday photographs that need to look effortlessly stunning on Instagram. The goal is a natural finish—no obvious air-brushing—yet every detail should feel brighter, crisper and more inviting than the raw shots I currently have... (Budget: £20 - £250 GBP, Jobs: Digital Art, Graphic Design, Image Processing, Photo Editing, Photoshop, Photoshop Design, Visual Design, Visual Effects)