Also he let certain things slide that I won't, like constantly replacing furnace filters, and smoke alarm batteries.

One roommate wants to move out because the other one smokes pot.

Let me just take a shot in the dark here and say that it's not likely that someone just starting out in wholesaling(the cheapest way to get started in real estate) can afford to just throw away $100 for every house they look at in order to decide if it's a good deal before they even put it under contract.

So I just started Airbnb with a property and I had a message from a potential guest asking if it's okay if they smoke on the patio even though the listing says no smoking.

@Roberta James @Ralphy Rosado  sub too in my mind is an advanced strategy and not at all appropriate for beginner investors who are not very well capitalized.Granted you get into the deal.. but for the seller these are HUGELY risky.. as least as it relates to the credit and potential for deficiency judgment if you cannot execute your plan.For the established well capitalized company or investor who can simply write a check to pay off the underlying debt at anytime or easily refi.. that's when this is an appropriate scheme.Touting this to those just starting in the business creates all sorts of havoc for many folks.I have seen people try this as a beginner strategy in get into a lot of hot water legally.and Seller get totally fubared vis a vi their credit if the person they deeded the property over to cant execute and goes dark.. or worse does a sandwhich lease option that gets recorded and that lessor goes dark.. its a cluster of the first order.

I’ve always had excessive damage problems with people who have pets or use hookahs / smoke.

The market is insane now and unless your buying a smoking off market deal market your better off waiting.  

I understand smoking, pets, subletting and the like.Also, would restricting cryptocurrency mining or electric scooters/bikes be appropriate?

Somebody even said as high as 15k which I figure he must have some smoking good deals.

They told me nothing about themselves, and chances are, there's a reason why... they were evicted, smoke, etc.