First off you must be very familiar with the workings of the Open-Realty CMS for a real estate listing site. I am in urgent need of a new system designed for signups, payments, listings, and agent advertising. The key features will be: Ability to offer agents a free account (or can have a set price to it) that offers a set amount of listings and image uploads Agents can purchase additional listings for set price. Agents can select to have any of the listings upgraded to...