Seems like a lot of people are recommended them here. 

I'd be happy to provide some recommendations and suggestions for your situation as a foreign citizen living in Miami.First, it's important to have a good understanding of the local real estate market, including pricing trends and neighborhood dynamics.

There seems to be a mis-understanding about what ESCROW accounts are. 

Check your state laws on tenant abandonment - then follow them.You can choose to be more aggressive, but make sure you understand the risks!

Holding properties in an LLC (or other legal entity) can offer valuable protection for your personal assets, so I understand why you went that route.

I couldn't understand why their credit wasn't better considering their income was what it was and their debts were not unreasonable.

They are prompt, proactive and understand property management from an investment perspective.  

I don't understand why you've owned an investment for 27 years and only cash flow $600 a month.

There are sites out there like passive pockets as well as this site where you can find out a lot from people who have invested with that fund.

Quote from @Mikal Toliver: It’s an exciting time go learn, understand, and practice real estate estate investing.