7 grand spent well should sort you out with a top notch set-up [ especially if you are willing to do some DIY which saves costs]...As long as you pay your electric bills on time 'THEY' will leave you alone[they are buisnesmen and the Police only check out your bills once you are already under investigation!] You might want to think long and hard about heat emisions ...detectable with thermal cameras!..and never tell a fucking soul!!!!!! ...except us