I have a proof of concept web page and can provide a personal story and touch.

Why not look for an owner occupant directly rather than going through this person? 

Based on your fact pattern (was a personal residence first and then a rental, not vice versa) I think you might be looking better.

The person who lived in the house was a family friend and we had heard they were getting ready to sell the property.

There are some other sources Im sure but Ive personally used the ones I recommended.

Lessons learned?

I'm new to the real estate investment world, and I have a desire to learn more about the best practices in the market.

Personally I don't really care for the upgrades.

There are no laws, rules or regulations preventing any foreigner, American or otherwise, to buy property in CDMX or Mexico for that matter.If, by having success, you mean getting a profitable investment, I'm sure many American and other investors got that over the last few years (I personally haven't since I've focused my efforts on Mexico's beach markets, which are far better in my opinion.

This allows me more purchasing power and I still have peace of mind being able to see the property as I am just starting out and want to learn more, (rather than leave it to a management company).3.