Hi,
I have more than 8 years of hands on experience on Linux Administration with BASH/SH/Python/PHP languages and i have worked with a lot of opensource developer' s project.
I got all your points very well and earlier i have worked with a Broadcast (Essel Shyam) Organization with similar types of projects that matches with your requirement.
In addition, I will provide a long time support for this project in case you require more changes.
Please accept if you like this proposal.