can these projects be undertaken using xml

hi.. i get straight to the point.. i would like to know if an xml database is viable for the following 2 website scenarios..

1. estate agent website.. an xml database holds details of properties and images of each property.. a form is created that allows the client to add properties.. remove properties.. order the properties.. which will in essence alter the dynamic content of the 'Properties' page.. also on the properties page there will be various drop down lists such as view property by price range.. area.. and so on.. is this possible using xml


2. template builders. my client wants to allow is members to login to their website..choose a css formated website template (from a selection of 6 templates, with about 4 pages of information per template eg. home, services, profile, contact us).. then choose which images they would like to include in the speicific pages (maybe upload their own).. choose the content to be placed within certain sections of the pages (the sections will be specified by ourselves.. eg divs) and 'preview'the page at all stages of construction.. once happy with the page then can save it... and the page will then be uploaded to our subdomain we have provided them (eg. www.oursite.com/Theirbusiness)


can these projects be acheived using xml forms/databases/protocols?