Quick job for PHP/MySQL programmer

1. We are using a classifieds CMS called OSClass that’s build with MediaWiKi – PHP/MySQL, Twitter Bootstrap and jQuery. We need one of its function altered, more precisely, the programmer will have to alter / create a script or module that will allow the admin to set and modify the 'expiration' date of all ads on the website. Each ad has a field where we can set the date when it should expire and become inactive. We want the same setup, but for all ads. We want an option in the admin panel for this. For example: if I set the expiration date on all ads (globally) for 10 days, all ads that were on the website for more than 10 days should be listed as inactive. The script should take into account the date the ad was published and the current date, if there are more than 10 days => expired/inactive ad. 2. The programmer will also need to slightly modify the comment form - when a comment has more than 1000 characters it gets cut off and a "more" link appears. After the user clicks on 'more' and the comment expands there is no 'less' link. We need that added. If the job is not 100% completed to specifications you agree that there will not be a partial payment made for work done. We pay 100% for complete work and 0% for incomplete work.