What visa status did you have and were you based in the U.S or did you do this from afar? 

There was a main house of 3 bedrooms 1 bath, a detached garage and then a structure in the back that had two small J1 Visa type housing units.

My fiancée both have good paying jobs but it might take longer than we want to save enough money to buy another property.

Real Estate brokers license. and the investor is domiciled in CA.... . other wise what you have can be deemed selling a security.. there is much more to just getting money from folks that blasting a rate of return out on the internet and getting inexperienced note investors to invest in these deals... there are rules of the road.. you may want to check into how this affects you being a CA resident vis a vi this loan..

Also, remember that foreign students have much higher and different hoops to go through from domestic - just to get a student visa, they have to show they have been accepted to the university, and full documentation to the US government that their source of funds is at a minimum enough to pay for roundtrip airfare, the out of state fees for a year, plus lodging and food/health insurance and then some.

Investor residency "I think" you would have to deposit USD 200k in a DR bank then you will be able to get an investor residency or visa.

If want to do a real deep dive on Intl Real Estate and Visas you should check out a youtube channel called Nomad Capitalist.   

U.S. citizens can travel to and from Puerto Rico without a visa or even a passport.

Her fiancée is in Air Force basic training and has a follow-on to Sheppard for his tech school.

So its all about what can you get, vis a vis to what you need.