User Interaction with a WordPress Site

Hi All,

I am looking to bolt on a sub domain to my existing site, to allow people to go on, and customize things online there and then. It may sound a bit confusing the way I am explaining, hence why I have posted on here as I wasn’t too sure what to search.

I am looking to allow users to go onto the new site, choose say a Website Template / Business Card Template etc and be able to click into it and edit it, for example add their own name / company logo etc. It should then give them a cost for the total they have selected, and then submit it.

Then, it should be sent to my inbox so that I can then get in touch, clear it all (any technical issues / finance) and then process the order.

Would anybody be kind enough to guide my in the right direction to go about this? I currently have a good understanding and knowledge of WordPress, coding, design etc, just not too sure where to start with this one.

Thanks in advance.