Hi Andrew,
I am an expert developer with the technology you need here, I am willing to do your project but, Kindly, let us be practical If we are looking for a business partnership then, doing this project in 24 hours will be like; cooking a curry without knowing recipe, without spices, and it is tasteless.
Although doing this project is not very-huge task but, it will take more than specified time and budget to give it the posted logic you want, with good quality (to keep up my reputation), and a bug free delivery.
Above is just an example, one need enough resources, enough logic to built a software. A human mind can produce 160 correct lines of code in a day.
Andrew, I hope you understand the concern here, and I would really be happy to work for you. Let me know if we can go-ahead with the development.
Time and Cost may vary upon getting whole of the requirement.
Andrew, I hope to hear soon!!
Regards
D