Travel copy-writing for a mobile guide

Num. of words: 100000
Industry: Lifestyle/Travel
Tone: Informal/Casual
Outline & Structure: I am looking for travel copy-writing service for our mobile guide.
The text is broken down in few hundred individual articles of about 100 words each.
Most of the articles are about individual attractions and some are about general travel topics
As to writing style, considering it will be used on mobile platform, I’d like to be engaging, casual, where possible witty. ...definitely not dry, encyclopedic. Obviously it needs to be 100% original.

To have a better idea how text is integrated in the mobile app check out web interface http://goo.gl/AiaOna
The project will include replacing most of the existing text in new content structure, and it will be done in several stages.
First stage will need to be complete by Sep 2nd.
Extra notes: Your proposal needs to include:
- how much work can you complete in a week
- what is your pricing for it.
Also I would appreciate if you could send me some samples of your work that you think are closest to my requirements.

Feel free to contact me if you have any questions