If you have wifi, then the best no hassle cameras are battery operated ones.

For example, I have a "Section 8" bucket with things that are typically needed for Section 8 inspections: 9V batteries; clear packing tape, extra outlets, window locks, outlet and switch covers, etc.

Well there are plenty of shared economy applications that allow you to earn extra cash off that battery powered ego machine(s).Really though, what if you tried to make a car sharing service into a investment model?

It should come with two batteries and a charger.

I've seen fake alarm systems which basically are stickers, SIGNS "(This Property is Under Video Surveillance" etc), and even flashing red lights that are battery powered-battery powered alarms - they have these at harbor freight, you can put on windows and doors- they're powered by magnets --Does anyone have recommendations for better battery powered or simple DIY alarm systems?

They have passed a battery of tests to become certified.Paul

I have a few DIY options such as battery powered lights, battery powered motion censor lights, and an option to plug into an existing outlet.

I can't tell you how many times I've gone to a rental house only to hear the smoke detectors beeping like a Chinese water torture because the they're too lazy to change the batteries.

Not sure about those two cities, but some require hard-wired, interconnected smoke detectors - costs more to put in than regular battery operated...Also, generally to North Texas:  it gets damn hot down here, so HVAC systems take more of a beating. 

As would canned goods, fuel, batteries and other necessities.One problem with gold as a currency is the indivisiblity.