You are advising a school district on disaster recovery plans. In case a disaster affects the main IT centers for the district they will need to be able to work from an alternate location. However…

A warm site includes some pre-installed hardware and network connectivity but requires additional configuration and data restoration, making it more costly to maintain than a cold site.

A hot site is a fully operational mirror of the primary environment capable of near-immediate failover, but it is the most expensive DR option and unsuitable for a tight budget.

Off site is not a formally defined disaster recovery tier with a specific readiness or cost profile in the same way that hot, warm, and cold sites are, so it does not represent a valid comparative option here.

A cold site offers a physical space with basic utilities such as power, cooling, and network connectivity, but no pre-configured hardware, software, or data. It is the least expensive disaster recovery tier because the organization is not paying to maintain duplicate systems - only the facility itself - which directly addresses the school district's budget constraint, though recovery time will be significantly longer since equipment must be obtained and configured after a disaster occurs.