Plug and play - Headlight Relay Kits
Yes, I could do that.
Some fans draw a lot of amperage. I did make up a fan relay set up for 6pk2godemon on their Demon. IIRC, they were running a 30 amp fuse so I used the same relay as my headlights kits use. Higher than 40 amp draw fans would require a different relay.
Nice thing about the mounting blocks is they slip fit together so it's easy to gang them together.