Auto posting of adverts to Gumtree

Hi, I'm looking for an application to auto-post pre-prepared adverts to a gumtree's website. Initially we want to post to only a few advertising categories in a single country, but may expand to advertise on multiple categories in multiple countries. The application should include the ability to store muliple adverts; multiple gumtree login-ids; create and schedule campaigns; and maintain a log of adverts that have been posted for each campaign, similar to "EZGumtree Poster 3.2.1", however, it also needs to: 1. allow images to be added; 2. allow me to determine a posting schedule that includes random timing within set limits; 3. ability to delete adverts (automatically in accordance with a schedule); and 4. check the status of adverts. Other desireable requirements, but not essential, include: 1. web based (so I can use it from multiple locations); 2. multi-user logins; and 3. dynamic IP address. Regards, Malcolm.