Zoho Desk

I work as IT for 4 hotels and there is 1 other IT person working with me, we are evaluating IT help desk ticketing systems and so far we like zoho desk.

We have a few questions:

1) We will have most people logging their tickets via email so they will just email in, can anything from the subject of their email be pulled automatically into a ticket field ?

2) Once the ticket is created can I go into it and somwhere assign a location for that person who logged the ticket like "Hotel1 Accounts" or "Hotel2 Sales" or even just the Hotel 1,2,3 or 4 ?

3) We then have a manager in each hotel that would like to be able to login and view all the tickets, we would like him to filter the open calls to view only the calls for his hotel, so far we have been tagging them "Hotel1" or "Hotel2" - is this the only way? Will I need a light agent license for each of the 4 managers ? - can they mark a call to be esculated with this liense ?