Seems like a good option for you, I can't really tell if they have a built in ad system but there are a lot out there if you look for one. Try to stay open source so that everything you do will be free
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I've setup WeBid several times. It is Open Source and the admin interface is nice. Customization isn't too difficult (and not against TOS, but of course read). The codebase is well maintained and the project is quite active, two considerations as you don't want something that might not be secure now, or soon--due to lack of updates and community interaction and reporting.
If you go with any script open source then you have to be a hundred percent that you have the latest version of that script and that there are no security flaws. Many outdated scripts today on the internet have holes in them that will allow a hacker to bypass anything that is bypass able.
Now i would like to know how i stop google from going any further into my data folders etc.I have been told with the robots text file (or maybe the htaccess file).Any further help please?I have banned google in the meantime