Please check your hardware carefully first. Compact Macs were not designed to be run 24/7, and when designing the compact Mac twenty odd years ago, the designers did not incorporate engineering safety factors for your proposed scenario. In the 1980s, I saw four year old compact Macs blow the analogue board and catch fire.

To run 24/7 safely, you need an analogue board that has been refurbished with *uprated* components. A late, standard Plus or Classic will probably be OK, but at minimum it requires a close visual inspection and a daily "nose" test. Back me up, please, Tom.