Code emails for desktop and mobile from PSDs

We have an ongoing need for simple emails to be coded from layered PSD's. We would want these emails coded to render beautifully across all platforms, browsers, and email clients.. and we would expect that the finished product will have been tested thoroughly. In addition, they need to be mobile-aware/responsive. Please send your costs/turnaround time for a single email, three different emails, and six different emails. Please have a rating of four stars or higher. Thanks.