Welcome to the Q&A Forum

Hi, and thank you for your answer. I believe that from all the link building techniques this could be the fastest and safest way to build valuable links from trusted websites. I am thinking that a good decision would be to partner up with other SEO's, keep a close relationship and just do it.

Maybe you could show your client this http://www.google.com/insights/search/#q=Vacation%20in%20Greece&geo=US&cmpt=q Which shows, although you get more traffic in summer there is still search traffic for the rest of the year for the pages they are taking down. This is an incentive for them to keep those pages up and for you to maintain your SEO plans. Just an idea to try win them round to keeping the pages up.

Your site should have a 404 page. This is a basic "I am sorry the page you are seeking does not exist" page. It should include your site's normal navigation along with a search function so users can easily find the content they seek.