You can connect cameras like "Blink" to a hotspot or Wifi system.

Once I turned it into a LTR I was determined to solve it, so I had a very reputable plumber camera the line after it happened again.

I wish you would have told us the year, it makes a huge difference.Anyway, everything you mention, plus 1) get a camera run on the sewer line, 2) make sure the Elec panel is newer and sized correctly (a lot of HIs will just say if it's functional or not) 3) Foundation ( is it slab or raised?)

Looking for some advice.A prior tenant did some malicious damage to my property.I called police, they attended and the report said they were wearing body worn cameras.

Squatters break into vacant homes, can present fake leases, and are a valid problem, but if you have cameras on the house, you will be able to get them out right away and you will see them going in.

Communicate expectations upfront—because once they start double-parking or treating the place like a frat house, it’s game over.Cameras, Cameras EverywhereYou’d think adults wouldn’t steal each other’s food, right?

So, you just check the cameras to see if you're having bad weather. 

The sellers had put so much pots, plants, planters and shrubs out that I thought there were too many plants/planters that would require a new owner to upkeep.After a few potential buyer tours/showings, the owner heard all the comments (via the security cameras) about how there was a "lot going on with the plants and stuff out front".

All for a sign as long as the property looks occupied...leave shoes near the front door, have exterior lighting, and at least a RING camera. 

Like you said , anyone can check the history,  I do have cameras installed and I do check twice weekly, it's not too far from my primary home . im a first time investor, is it ok to DM the listing to see if I'm missing something?