Suggest budget camera for commercial building

Hi. I've been asked to survey the security system for the new building for a customer. Unfortunately, my current installation is smaller ones like retail, convenience store, grocery store... My partner passed this opportunity to me but with little experience with building and integration, I might need some help. It's a small tender of a 30 floors commercial building. The construction will be finished by the end of this year. If I go with Honeywell, Digital Watch Dog, Stanley or Secom, there will be small money for me to make. To be frank, I'm willing to put efforts on my own but I do want to earn some money from this project. Just I want to collect market information regarding any new technology I've missed before. Thanks!