Can you sue the apartment complex if you're self employed and your vehicle and tools were stolen?

In a few cases a landlord was held responsible for negligence for failure to provide some type of security to protect people from violence. I do not believe that case law has extended to include property. Your insurance should cover your losses.

I don't see how the apartment complex would have liability for the theft of your vehicles and your tools. I hope you were insured for your losses. Many vehicles are never recovered by law enforcement.