classifieds ads system for cars multiple site

I would like a website for advertizing cars and trucks and parts for different countries Specs below Phase 1 • Autos marketplace script o Allows several categories o Country list o Images in Ad (upload) to 1 folder for all local websites (with watermark) o Multi-language • Sites: [login to view URL] and x other local sites. (. I filter in basics on category (only trucks) only parts or all and on country so site x shows all ads site y shows only trucks and site z shows only adds from country z (all in one database) i want per website (domain) a xml file or settings page where i can set what categories to show. • Ads posted at ExportCar will be shown in local sites. • Ads posted in local sites will be shown in Exportcar but no in other local sites. • AdSense in site • Newsletter (per site) registration • RSS feed. • SEF urls. SEO with meta tags, titles etc. • XML map • My Ads admin panel, yes, but simple frontend just to manage ads. a page per dealer. • After posting add, peope get automatically a login (emailadress) and password (if they didn’t create it yet) i have a current joomla site that is doing all this, but i don't like joomla, it's too heavy i think. i want it simpler Phase 2 • Accept PayPal for upgrading adds and spotlight paypal payment if i want to show my url in the add • Xml Upload • Multi currency table for exchange • Shipping calculation • Auto tweet (send to twitter) • Newsletter sending • Google Maps (show dealers per country on a google map) Phase 3 • Mobile website ([login to view URL]) other layout just for (iPhone, Android)