XML Feed component for Joomla/EZRealty

I am just completing a property portal using Joomla 1.5 and property listing component EZ Realty - [login to view URL] - I need to be able to take XML feeds from agents that will populate an account I have created for them, so the process will be: 1. Agent pays (do not require payment link to listing) 2. Agent sends XML feed URL 3. Site owner, me, inputs URL to component that allocates properties to agent account 4. Component must de-duplicate, add new, delete and update existing agent properties. It must also take pictures and generate thumbnails. This piece of work must be a re-useable component/plugin/module that will take feeds generated by [login to view URL] (I have a detail document available on request). I require a firm price (I'm happy to discuss via Skype) and a detailed work plan including process and outcomes. Please feel free to contact me via Skype chat, not voice. Thanks Nick Garnett