So I had a buyer and his financing allegedly fell through.

So looking into duplexes around my area I see a handful for sale with tenants already in place, and what seem to be decent profit. maybe 300-500 dollars a month? Thats based off rent income vs what I pay for the prope...

This way I don't have to wait a month+ for him to get his alleged proof.Thanks

You may want to do some research on here regarding the 50% rule before making allegations that it's "made up".  

(operator of realtor.com, Top Producer, SocialBios, ListHub, and several other companies) against Zillow, Inc. and Errol Samuelson.The suit alleges breach of contract, breach of fiduciary duty, and misappropriation of trade secrets.

Month-to-month tenants allegedly paying $1,000/month. 

After facts (not feelings) have been investigated, I was cleared of all false allegations.

If this is an issue you can add more requirements in qualifying applicants that favour applicant willing to stay for longer term, may with this in place you wont feel guilty, no applicant will feel cheated and there wont be any form of discrimination allegation against you. 

Even if the (alleged)drug dealing was reported, OP would be lucky if the police department even kept a record of a report of a suspicion of drug dealing that he heard from someone else about someone else.

But if you start seeing foreclosures increase dramatically, home affordability increasing dramatically, prices dropping, tons of days on market, investors getting out or foreclosed out of the industry, high cash ROI’s, people talking about the end of the world and RE as we know it, it might be time to start buying on a regular basis through the “alleged” bottom..?