When I have $10,000 in 2 months im gonna quit the foundry job and get the cdl and pass all the drug tests.

A person that used cocaine 10 years ago that has been out and clean for five years is not the same as a drug user that just got out of prison last month.4.

Next, install hyper sensitive smoke detectors, wi-fi video of common areas, and hire moolighting police drug-sniffing dogs, preferably German Shepherds.  

Over $400k, for some contrast, I can (& do) default to waving all lender points/fees.CFPB/Dodd-Frank is set up to benefit those borrowing larger sums of money at the expense of those borrowing little, Congress was on crack when they wrote it and should have been subject to their very own "zero tolerance" anti-drug policies.

My tenant was a bad apple... dealing drugs in the property.

Most tenants are month to month and seems most are local and drug users. 

If the OP made this same mistake they can alleviate any worry’s by simply looking at the detailed listing and making sure the seller is offering a buyers commission?

It could have to do with alcohol or drug abuse.

apart from just generic House Rules and obvious things like hey pay your rent no drugs blah blah blah

The 'clients' put down $8,000 & paid us $1300/month (expenses avg $525/month) for 9.5 years then stopped paying (got into drugs).