I often see people buy Mac minis (or other hardware) just to keep a bot running 24/7. For many OpenClaw / Moltbot / Clawdbot setups, a small VPS is enough and removes the hardware ops burden.
OpClaw.io is a simple option: $10/mo for 4 vCPU, 8GB RAM, 150GB SSD, with OpenClaw + dependencies preinstalled. You SSH in, configure, and it's running.