Good day,
Let me start off by stating this: I have done a quick calculation on the amount I quoted, and for $30,000 it works out to $2 per image created. Depending on the quality of the current images (current background), I can do about 20 images per hour. If I work 10 hours per day, it negates to about 200 images per day, which means this project will take 75 days at least.
I have worked on many large projects (including the latest where I had to design 4500 logo's for a website selling domains), so I have loads of large project experience, therefore I can say that anyone who claims they can do it in less time, don't know what they are getting themselves into.
With regards to experience, as mentioned above, I know how to plan and execute large projects, and also have done multiple projects of background removal and product mock ups for websites. We can discuss the precise details and milestones further should you contact me directly.
Looking forward to working with you!
Regards,
Daniel