Per Cathie Wood's ARKK Innovation strategies, these are the tech revolution area for next 10 years:Deep Learning ( Nvidia, Google,FB)Re-invention of data center (Cisco, Junipers)Virtual Worlds (Microsoft,Apple)Digital Wallets (Square, Paypal)Bitcoin (paypal/Visa)EV (Tsla/Nio/Xpeng/QuantumScape,Blink,Chargepoint)Automation (Apple, google, everybody)Autonomous Ride Hailing (Uber)Delivery Drones (Amazon)Orbital Aerospace (Nasa,Lockheed,Spacex)3D printing(HP)Long read sequeincing (Genentech)Medical Robotics (Intuitive Surgical)Cell and Gene Therapy ( many startups)All these companies has HQ and research facility in Bay Area.

And then I would consider fake cameras, they are cheaper if the get stolen and they are a deterrence that scares people off even though they don't do anything.

A helicopter pilot on the Santa Monica Airport Tower frequency cautioned he was heading out over the water to chase a stolen lifeguard boat.

I'm a first time landlord looking for some quick advice - my tenants have experienced a few stolen packages at their unit and I'm thinking of getting a quick security camera to install on their door to scare away potential thieves.

So remember that, and you will hopefully avoid losing your hard-earned money (and/or having your identity stolen) when getting these types of email solicitations. 

@Chris Mason save the bungee cord setup and buy a subscription to www.yourwelcome.com - digital guest guidebook on a smart tablet built for short-term rental guests, collects guest emails, serves property guide info and videos, local recommendations, and upsell services...if it gets broken or stolen, it's replaced for free. 

Many areas of Detroit were like that where you would have nightly break ins and even have supplies stolen from your truck as you started to take material inside. 

That property / stolen thing does not belong to the buyer because the seller never had legal rights to it and could not sell it.

On Airbnb, if they break stuff, you usually get a bad review if you try to charge them, especially for petty stuff that would be a reasonable apartment charge like a broken fridge door shelf for $60 or stained sheets/towels or stolen power strips.

That’s the problem:  if he isn’t lazy or incompetent, he has stolen or lost your money.