Oklahoma Fire Suppression Systems & code enforcement ???

[Josh Chappell]

I have found an 8-plex that has been vacant for around 10 years. My partner and I are getting numbers together for a potential offer and have come to a stand still. Here is the problem. 

All meters are pulled and the city has told me that the building has to be brought completely up to code and have a fire suppression system installed. I have called around for potential pricing on these things and it seems to be like finding needles in a haystack. Could anyone point me in the right direction as far as code enforcement and pricing goes and fire suppression system pricing?? Also, I'm wondering if anyone knows a commercial window guy that I could get a quote from, that would be awesome as well. Thanks as always.