The company has little desire to encourage you to live outside of Dubai, as that conflicts with the whole ethos of the Dubai leadership. Perhaps this is why the word commute has been carefully excluded from the initial email? As a result I would expect no travel assistance whatsoever on your days off.
On your 28 days on - you will essentially be working a full month for less cash, as has already been hinted in the email. This is nothing more than a cost saving exercise for the company!