So much for the assumption that 517 meant 5th floor.
Your friend should've went inside to find the real answer.
I just talked to the receptionist at TADF, the number listed on the website. She stated she was in suite 517 of a two story building at the address, 123 west Nye Lane,Carson City. The builing exist, the address exist, and the receptionisp answered the phone with "Tacital Air Defense, how may I help you? So lets put the "5 TH floor to rest!
Still, I just checked their web page and they say 5th Floor with no mention of any suite number.
I will be going to Carson City sometime this year and will definitely pay them a visit.
When you spoke to someone was it an actual receptionist or the answering service? When I called them, the answering service did not identify herself as such (like when you call a doctor's office).
I wonder if they got a chair for that desk and phone? (haha)