I have a cloth play tent and camping toys (battery lanterns, felt foods, teeny pots and pans, colorful flashlights) in the kids’ room.

We rent rooms in our house, and one morning woke up smelling gas *throughout* the house. Our tenants somehow had not turned off the gas range all the way after cooking. These tenants also liked candles....OK, so I gue...

The only issue with the solar for the power source for the heat pump is that when the heat pumps are needed the amount of sunlight is reduced, short days of winter and night time, it is essential to have a good battery back up to help with the demand. 

How about an outlet for the RV so the owner can plug in a battery charger, water tank heater, etc?  

Point-and-shoot camera (I take a couple hundred photos per property, which uses a lot of space on my phone and drains my battery quickly). 

Then some PM charge a service fee every time they send someone to service the property or if they go to inspect the property - in other words, you might get nickel-dime'd with all kinds of other fees, that could easily raise the "PM fee" to 12%+ (we once got charged $45 service fee + $9 per battery to change the smoke detectors batteries at make-ready).Regardless, you need to factor in at least 8% PM cost, even if you self manage (after all your time costs too) as there might be a time when you might want to (or be forced to, like sickness or old age, or desire complete passive participation) to be completely hands-off and you'll need a PM.

Downside of these - batteries die, and not always reliable in very inclement weather.

Due to the fact that batteries go bad and wireless systems can get frequency interruptions, hard wired systems are the most reliable and desired by fire marshals and Inspectors.

Hello, By law does landlord need to change smoke detectors batteries or it's the tenant job.

For your situation, maybe you could look into consumer grade battery operated cameras?