Luckily I was in a buyer's market at the time, but about 75% of agents did not even respond to me and I could not set up appointments online because I was not a MLS member.   

We use DealCheck to underwrite deals and QuickBooks Online for everything related to accounting and numbers.Classes allow for separate P&Ls for each property.

Note I 100% know that CPM is not LTR PM with a few tweaks- I have lived and practiced this for over two decades. 

Been getting nowhere with zoning laws found online and in the local library for Yonkers (in westchester county) as to whether any permits are needed in order to operate such a business. 

Now you are both making money and he gets practice managing the work load. another thing to consider- why force the situation?

There are so many online hard money lenders.

Check out the free content online of Bill Faeth. 

You can create your own, or there are house flipping spreadsheet templates available online 

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.

From our experience best practice has always been to have exterior cameras as well as smart locks.