My question is, what are the simplest or most basic ways for a spouse to qualify for this?

The simplest answer is buy the best you can afford to buy.

So, I'm not sure what you can do there aside from trying to compete with the likes of the Four Season's.The success of a real estate investment Mexican model hugely rests on mass tourism and that's the basic ingredient that's going to lack there. 

It’s the simplest way to get a feel of what it is like to be a landlord without going through the hassle of managing rehab projects. 

The most important ingredient in real estate is time.

If your parents can wait that long it's the simplest.

Figure out what you are trying to accomplish, and then look for the simplest structure that will accomplish that.Generally working with irrevocable trusts is primarily an estate tax planning tool. 

It’s highly unlikely any lawsuit will go so far as piercing your limited veil protections.However, it’s the simplest of downloadable loan template forms to simply document the parties, the amount, terms, duration etc.  

I'm not joking but youtube will show you have to replace click on LVP in the simplest way. 

That being said, I will do my best to share as much as I know about this type of financing, in the simplest way possible."