"Home defense"? Are you serious, or are you really a peeping tom? This seems like a bizarre and extravagant expenditure for home defense (or, really, anything, other than stalking).
I have actually used the most current military NV goggles (I thought they were still unavailable to the public, though I may be wrong) at the Army Rangers school, but was told they were priced at something closer to $10,000. Admittedly this is the same DoD that paid $400 for a hammer, and $1,500 for my gas mask, so one never knows whether that reflects their market value.