Greetings,
Happy to see your project post. I have gone through from your project brief, and I am confident of editing images enlarged to 1000 pixels including the background removed completely, and the image turned into a PNG. I am a professional image editor, well versed in Adobe Photoshop and Lightroom having 12+ years experience of Photo Manipulating, retouching pictures, Photo Editing and Image Compositing.
If interested, message me, so it can discuss this project.
Regards,
Stella