Hello Sir,
As I went through your requirement and would like to say that I will develop this solution for you as I am having 5+ years of raspberry pi experience as you can see that on my profile, and customer feedback too. I know it will bit costly for you but ultimately the quality of work matters a lot and as experience on raspberry pi I can assure you on that. Also as you can see that you have to do a minor modification on code according to light and angle condition as a one-time process which I will do for 3 times free of cost.
I believe that will build a good relationship with this project to help each other for the future too. Also, I will give my 100% to satisfy you with my quality of work and will make good product/PoC for this amazing idea.
Thanks and I hope you like the proposal. If you feel anything you want to discuss with me you can contact me any time I will be happy to serve you.
Thanks
Bhavik