Seamless Photo Object Integration

I need a skilled Photoshop expert to add an object from one photo to another. The integration must be so seamless that it is indistinguishable.

Requirements:
- Add an object to a new photo
- Blend the object seamlessly
- Achieve invisible blending, no visible seams or alterations

Ideal Skills and Experience:
- Advanced Photoshop proficiency
- Experience in photo manipulation and blending
- Strong attention to detail
- Portfolio showcasing similar work

Please provide examples of previous work and an estimate of the time required for completion.