I'm a visual artist and graphic designer specialized in creating 3D mockups for products, as well as mockups with Photoshop. For your project, there is no need to make real studio shots. The ideal approach is to create realistic digital mockups. For that, you can use ready-made templates. For example:
https://www.uxfree.com/tag/Postcard+Mockup/
Otherwise, I can place a realistic 3D render of the card on a stock image of your choice.
Please check my portfolio for references of my work and contact me to discuss details.
This price is for the 60 images, I can't do any lower.