Just did something similar with Google API (It was for my company uses Maps places API) along with another API to compare between
Important: I do not do plugins, I do pure Excel spreadsheets that host macros, no plugins, no setup, just an XLSM file that does the job
Anyhow, would love to have this project, as you can tell from my Linkedin profile, and resume on my website, I have done tons of projects, and my bid should be reasonable
The work is done, or I retire, I DO NOT turn my back on a project.
And starting 2012, all my projects has the ability to be customized by user, means end user will get a sheet to change settings that we (I and/or Project owner) think they might need to change.
This way, we can guarantee that the tool will live as long as possible without the need to getting back to developer for small changes
And if time permits, can also present a simple UI allowing user to do these modifications
To be honest, I did not go through the attachments in complete details, just quickly went through
Any questions, please email.