use same alias under different folder

Hello,

I would like to build up a pyramidal URL structure (categories, subcategories and so on) and not a flat structure. Also I would like to use same ALIAS under different folders, forexample:

• http://www.example.com/apartments-for-SALE/one-bedroom-apartment/
• http://www.example.com/apartments-for-RENT/one-bedroom-apartment/

My questions are:
It is possible to use same alias under different folder? What is your recommendation, how would you use categories, taxonomies and tags. Which structure would be the best solution for a site like this?

thanks