General liability comes in three basic forms; Residential, Commercial and Municipal. One will not GENERALLY include another, but could on a limited basis. Around here, your apartment complex would be considered Commercial. There is no such thing as "basic coverage"; it's not like auto insurance. The cost will depend on your specific circumstances. Where I pay $850/yr for $1 million, someone else may pay 3-4x that. Start with your insurance agent. Next choice - find an independent agent - one not affiliated with a specific company.