Without an ITIN/SSN, I'd be worried about running into KYC/AML violations, fed tax liens, the borrower being deported, lien enforcement, etc.

OPIf you have a company with a Sales tax license.  

I'm not sure how attractive the numbers will be however when looking at HOA dues, insurance, taxes & the unpredictability of future costs with HOA dues.

Investing in a mortgage fund should not have tax implications for your Roth IRA since the investment is passive. 

How is it for preparing taxes? 

To succeed, focus on properties in high-demand neighborhoods like Pecan Grove or Aliana, and ensure your cash flow analysis accounts for high property taxes, potential HOA restrictions, and flood insurance costs.

Credit is a factor as bad credit may limit options, or may have the lender require you to put 10 or 20 years of taxes and insurance into escrow. 

Anything that was not paid back after the first 6 months accumulated 1% per month ($500) to the balance owed.

Plus with no state income tax, cheap insurance, and very low property taxes, I’m probably starting $20k ahead of most people, and that’s a tax free $20k.).

Note that I live in the Netherlands, which has many tax laws.thank you