Integrate onto wordpress via xml

General information for the website: XML integration
Description of requirements/features: Hi,

We have a website we are building for a client of ours which requires to have some xml integration carried out to pull in property information into the website.

The simple integration is to use iframes but this wont help use really when having to style these sections of the website.

Here is an example of the xml formats:
http://videos.estatesit.com/page/feedxml

The website we are working on is wordpress driven and we would like to use 2 page templates to show the information such as:
http://www.bindingdigital.co.uk/sept-newspace/propertysingle/ (currently hard coded)


XML isn't something we are familiar with, so anyone whom has carried out this sort of work before please reply with how long this would take to add and how much?

We can provide you a design to show the elements we need to pull in such as a search facility.

thanks
Extra notes: