If the complainer can't smell it in their apartment, but, are uptight enough to be bothered by the passing smell in the hallway...it may not be the smoker that has the problem.I have found that complainers/boat rockers are often wound a bit to tight, and that when you are a highly responsive empathetic landlord, they turn you in to their own personal karma delivery machine, to right all the wrongs that previously fallen on deaf ears.Good luck.

hint - It ain't always them.There are a few "fatal" mistakes you can make in Real Estate, seems those were only "flesh wounds" but not to be repeated!

@Tony it's interesting that your 6% locked rate wound up changing so much prior to closing.

In truth we could have started with 10 great ones and wound up so much better off over time Powerful advice!

An ounce of prevention is worth a pound of cure. ...I've bought properties with bad sewer lines, but I KNEW what I was buying because of the scope, and I factored that in to my numbers and offer...without the scope, I would have no idea what I was buying, and I would've wound up with a significant unanticipated capex.We inspect every other part of a property before buying.

Tell them what you were pitched with and what you wound up in.

My greatest pain point is not that the deals failed, although that certainly adds salt to the wounds, it's the poor communication, false narratives, chasing (almost begging) for updates, lack of full disclosure, the smoke and mirrors, etc.

Commercial values can fluctuate greatly - I am a fan of time heals all wounds and if you acquire a commercial property and can turn it around I believe there is still money to be made. 

We used wheat we learn to buy non performing notes, and wound up turning them into rentals.  

In 6 months they will be licking their wounds having given up on the system, now being that much further (by the amount spent, amount lost investing, wasted time, and emotional devastation) behind in realizing their goals and dreams