Just bought a home, money super tight so I am considering two options. The first and cheapest option is getting a used above ground pool off of Craig's List.

Here is my question about this option....
I plan on putting in a deep end and expandable liners must be overlap liners. A pool I found is the perfect size (15x30 oval) but it has a beaded liner system. Can I remove the beaded receiver and make this pool an over lap liner pool so I can enjoy a deep end? Also do over lap liners go right over the aluminum wall or is there plastic coping underneath the liner to prevent the sharp edge of the wall from cutting the liner?

Option 2 is me building a wooden pool, but I need to make some drawings before I ask questions about that.