They use distance sensors and algorithims to map an area so they can go room to room on the same floor.They also roll themselves back to the recharging station when the battery gets low, and after getting charged, pick up where they left off.You can schedule it to run every day, every three days, whatever.Biggest drawback is that the dust bin is a little small.

Here's my experience: accept the Section 8 applicant, inspector comes about a week after; he's required to fail you based on one minor infraction, such as a loose wall plate, missing fire extinguisher, smoke alarm without battery, etc.

Locally We are adding Full solar with whole-home battery EV charging and Smart home compliance for the newest group of Renters who will pay extra for these features.

Salt Water corrodes a car like battery acid.

Can buy for around $200 on Amazon.Reolink Outdoor 3G/4G LTE Mobile Cellular Battery Security Camera Reolink GoYou simply put in a sim card and download their app.

Anyway they store data on an SD card that you have to check manually, but it is inexpensive, battery operated, and easy to hide.

This video showed a property in good condition but with 3 smoke detectors which the tenant removed in lieu of replacing the batteries.

Still, plan on putting cash into the annual inspection and definitely plan on $20 for lightbulbs and smoke detector batteries.

I currently get all of my electric used on charging the car via my house solar system and with the heat of Florida draining my batteries faster than normal.. im really only averaging around 32miles on a full charge... 

Gutters, furnace filters, duct cleaning, dryer vents, detector batteries etc etc.