No, just inform them you are the new owner (they may want proof) and provide them with the address to send payments. 

Jordan,The burden of proof will be on you (your attorney) if you sue your neighbor.

We are wondering how to go about showing proof of funds if the deal ends up being an on-market deal.Any advice would be helpful.

., old history) rather than listing it as available for rent.What is going on with Zillow’s listing display?

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.

There's no proof it's even bottomed yet. 

2) Time spent by others: to qualify for the test "100 hours and nobody spent more time", how do we track the time spent by others and what proof would be required in the event of an audit?

Any other recommendation to ensurebthat umrella insurance is full proof and that it actually works and they dont bring that one disclaimer if and when it comes for actually paying for the insurance claim,  if ever.

Maybe self manage when you have just one, and once you have proof of concept and want to convert all the units, then get a property manager?

I don't have experience with the Detroit Land Bank, but generally land banks are pretty reliable, but...they are low money buys (from $1 to $1,000) that require you to show proof of funds for the rehab.