They will require about 75-150 inflowing connection and more web pages intertwined with rich keyword text. In order to get those sites to rank higher, it would take about 3-6 months depending on the present SEO state of each site. The reason is two-fold.
Payment is only made whenever a user clicks on your ad-link and visits your site. Google also monitors click fraud, so one of your rivals cannot just click your ad so many times and destroy your entire budget in a single day. Skilful internet leads are needed for success in this current marketing center.