Example, if I have 100K liquid and readily accessible and I own 2 properties, I can obviously put 25% down for #3 and rent it out but that leaves with me very little wiggle room.

You also have to pay for MLS access.

So not a small amount of effort by tenant plus no access to each room for 2 days. 

If you are an agent or an investor that has an agent that would like to help us out and get instant access to off market deals please let me know!

If you don't have access to the MLS you'll have to use Zillow or Realtor.com or some other online tool to look at recently solds

You can also have an agent with MLS access look up cash transactions for you & create a verified list. 

Make sure you check out all that this site has to offer.There are a few self-contained guides that you can access here: https://www.biggerpockets.com/guidesAlerts can be really helpful too: http://www.biggerpockets.com/alerts

If you don't have access to a broker just yet then Reonomy is the next best thing. it does cost around $500/mo least i checked and you can only download 500 leads per month but the data is rich and accurate and you can get super granular on what asset type you're looking for.

I really like the alerts feature that can quickly guide you to current topics that may be of interest: http://www.biggerpockets.com/alertsThere are a few self-contained guides that you can access here: https://www.biggerpockets.com/guides

There are a lot of real estate agents in Tulum so, if you deal through an agent, you'll only have access to a very small part of the inventory.