You can either rent or purchase this domain.
Rent of the domain costs PHP 6 000 or €100 a month.
It can include hosting (same price!) but you can also choose your own host.
Advertising on davao.ph can be done for €20 a month for each month.
Interested companies can send offers through private messages of the Facebook page of Davao.PH.
If the site gets sold or rented, then you will of course have access to the Facebook page as an admin.