Drug dealing and prostitution.Some parts are trying hard to become safe and nice again, but prices are higher there.In the 1950's Detroit was the "Richest City in the World", many of the relics of that time (those un-burned) remain, and today still sell in the million dollar category (once rehabbed).The Detroit of today, is a long way from Mayor Cavinaugh's Detroit:https://www.youtube.com/watch?

It seems that the combination of a poor U.S. economy combined with misinformation about the dangers of drug violence is really affecting business in Baja.

People HATE car dealers for making a few hundred bucks but will not bat an eye for the $20,000 they pay a realtor to make a few phone calls/emails and add you to an automated mls feed, sign a premade contract. 

I don't know specifically what is missing from your property management lease, but some things I can think of off the top of my head (check your state laws of course to make sure they don't conflict with any of these):--no trampolines--no day care center or business where clients visit the home--rules about parking vehicles on the grass--septic agreement (if property has septic)--watering restrictions rules (if your county has them)--smoking rules--pet agreement--drug free housing addendum--mold addendum

As long as the loan you have isn't an FHA loan, I don't believe it is a dealer killer.

Also check some broker-dealer sites such as dalmorefg.com who brokers the majority of regulation.