Instead of going crazy with security, why not get your equipment covered by your homeowners insurance? A camera won't do you any good if your house catches fire or floods.
Yes, I highly recommend anyone with expensive mining equipment do this. I would, but I no longer have anything to insure.
For those interested, I received a settlement from my standard insurance policy that doesn't come close to replacement cost. Standard insurance policies have limits on single items and items used for business. To avoid frustration and extreme disappointment, insure each if your miners for replacement cost and lost income.