Install some cameras, send a notice to all saying tampering with smoke detectors isn’t allowed.  

Good idea about inspection with a camera/video.

I wouldn’t be afraid if you got three years proof of good cash flow and you put cameras In .

I guess I got the idea from other local area businesses (mainly bars) that have done the same thing - anytime a patron is caught on security cameras doing something egregious and causing damages they will post it out on social media - usually the person is quickly identified and they end up making amends and paying for the damages.All I'm seeking is our money back without having to lose half of it to a collections agency and secondly for him to knock his bullying off. 

It'd be tight, but you could cook dinner while still in bed...https://www.homes.co.jp/mansion/b-9520000416/ The condo is so small the couldn't even fit a camera in it to take pictures of the inside!

The cameras are of all sorts, infrared, you name it and they are capturing the Earth with it.

Says there must be a blockage.Pay a small fortune to run a camera through all the downstairs ducts... no blockage, house still warm, you can see the spider webs fluttering in the air from the furnace in the ducts.This is probably going to crater the sale.

They ran a camera down there and discovered scale deposits in the pipes.

With that being said, I still have video cameras and motion sensor lights on every door.

I used to live in an old 30 or 40 unit building which had a few security cameras inside and outside the main entrance & in common areas like the basement laundry room.