Be careful with free sites, they only have a couple months of actual data and then project the rest with an algorithm tool.

More and more people see Tulum as an environmental disaster.Most Mexicans and the majority of foreigners I've talked to definitely don't want another Tulum so be careful what you wish for.

We are planning to manage it ourselves.We would live close by.I am currently reading and watching everything I can about landlording. 

Be very, very, careful with state-based lists.

I am planning on doing all cash on an offer to make it more competitive and then getting a mortgage immediately after, but I was advised against doing this by a lender.

With plans calling for a 3/3 unit and 2-2/2 units and similar triplexes trading north of 750k this is a home run investment to keep in his portfolio.

What's your plan?

I've seen a vacant lot for years and have had what I feel the perfect plan is for it.  

One of the main things is the financing so make sure you take care of that first to avoid potentially waisting a lot of time.Now to your questions:Buy and flip: that generally won't work in Mexico.

Not that I care, but the real estate commission seems to think it's worth investigating.