Start with your SLAs. What is the RPO for that database (recovery point objective, or how much data may be lost)? What is the RTO (recovery time objective or how long the DB needs to be down)
Without those, there is no DR plan that can even be considered.
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
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