Security for offices

[Adam Beckstetdt]

I have a condo that has been fitted to be a coworking place of 7 offices with a conference room. What are some good recommendations on security cameras and/or alarms. I would prefer to not have to get a service and pay $50/month. There is a shared lobby with 2 other businesses and my main concern would be to protect just my place. It has two doors coming in. The main one from the lobby, a side door in one of the offices, and a slider door in the conference room. I'd love to hear your experiences.

My thoughts were to install cameras at the entry points outside so the cameras are visible and hope to deter entry.