Add products to website

I am looking for someone for adding new products to my website.
All of the products and information are available on the suppliers websites or will be provided. Most of the products will require a quick search for additional product picture from the internet (2-3).
Requirements:
- Knowledge of Shopify admin (creating collections / product pages / categories)
- Experience in uploading products to website
- You know meaning of Meta title
- Attention to detailed (some products are similar to others)
- Flexibility - if I give you task, it should start within 24 hrs
- Some weeks may be quite / some weeks can be expressly busy
Please send me your offer for 50 products and offer for 300 products (this is and average N of products per months)
Also I need to know how long would it take you to upload 50 products and 300 products to the website (in average).
If you can provide websites you worked with, will be an advantage.
Thanks for you time and interest in this project.
Do not hesitate to contact me if you have any questions