Although I'm local to Mt.

Magistrates tend to have long memories and also tend to hold grudges against local incompetent landlords.So if he wakes up and talks to someone with any brains and experience, this won't go to court, but he'll start looking for another excuse to get rid of you, something much easier to argue in court.

Real estate laws are local to the state where the property is located.

Here you would sell to someone that can run their business form the home or the garage/workshop if that’s allowed by local code. 

If you build a good relationship with a local realtor, they can assist.

Until you learn to estimate yourself, based on your local costs, any estimate will probably be off.

I added a new software platform, got rid of all abandoned vehicles, raised rents, seal-coated and striped parking lot, took out loads and loads of trash, got the phone number working and started marketing to local community groups.

Reach out to a few and see who you like.You can also ask members of your local real estate investors association for real estate accountant recommendations.Good luck.

Is that a national guideline or is that just more local bank conservative standards? 

From talking to locals, there's a couple of issues than need to be addressed, some are the non-ecological practices that some of those developers have, unfortunately, our government profits from this investors and allows them to destroy manglers (which are the natural water purifying system of that area) dismantling hectares of mangroves and degraded the habitat of resident and migratory species burying animals alive.There's proof of fecal material floating beneath the city of Tulum, only 20% of the water is sent to the water treatment plant, there's no infrastructure for the exponential growth.The landfills in the middle of the jungle that is leaking hazardous pollutants into the freshwater system and that something that developers won't tell you.I love my country and it would be a disaster for everybody if this place ends up like some other great beaches around the world, that are completely ruined by greedy investors not following the rules.There's no urban or comprehensive master plan, and one of the risks is that Tulum will be like Playa del Carmen is today, overgrown and with environmental devastation.I will advise doing a lot of research before getting something in Tulum, different country, different rules, and practices.