I bought an apartment and even though there was no safe, I was tempted to remove the flooring everywhere just to see what was beneath it... I wouldn't last a second without opening that safe. I'd probably try and make the robot myself though :-)
We own a 100 year old place that we’ve been renovating for the last 2 months (when we took ownership). I found a (small) stash of money under the carpet (about £200 in pristine 1990s notes).
That’s probably the best thing I found. Less savoury was the discovery that the house was, in fact, owned by rats. They were everywhere. There was a lovely little nest made from a bag of straw and lined with a newspaper from 1938. They’d eaten into the expansion tanks in the loft so they had a fresh supply of water.
Based on the couple of houses I have purchased in my life, rodents own a lot of things. Until you bring the cats into your life. Then the rodents don't own as much. You still don't own anything either, because the cats become the new owners, but they are at least preferable to the rodents. ;)
You could theoretically look through all the walls with an old dental X-Ray unit. I remember reading an article on here about someone who reverse-engineered an X-Ray-sensitive camera module and used an old dental emitter as the source.
All the radiation shielding would obviously be get important. :D
