@mast0d0nphan @ana there's nothing worth reusing in a mall. Data centers have racks of heavy equipment inside and generally heavy cooling setups on the roof, too. Mall construction isn't rated for that. Cheaper and less risk to demolish and build to spec than to retrofit. Nobody wants to fry millions of dollars in server hardware because the retrofitted mall roof leaked.

The site is flat, but unless you get lucky it probably has none of the other things you'd want (like proximity to big power lines or network backbones).