Managing comments for guest posts

[bsgcbs]

I am looking for a solution where I can approve a guest post (after reviewing the post for content, validity, etc.) and then after I publish it permit the author of the guest post to manage comments (permit them to be published, respond, etc.) as opposed to just the site administrator. I am hopeful (probably wishful thinking) that the guest posts will eventually number in the hundreds or more.

I was led to genesis frameworks after viewing some information on gravity forms (where there was a suggestion to use both in combination). Please give me your thoughts as to whether I am on the right track or whatever other alternatives you would suggest.