Be very careful w private real estate syndications, some great ones, some really not great ones, and takes years of investing experience/understanding debt/property management/taxation rules etc before you should safely go that route, but then they can be awesome as they give high yields w passivity, the Holy Grail of RE investing :)you are on the right path, and RE far less complicated than the Krebs Cycle too :)

@Ernest FoxI recommend speaking with an accountant that specializes in real estate taxation to discuss your options and advise you through this process and throughout the year. 

Regarding the taxation of proceeds (fees and interest payments) earned within a Roth Self-Directed IRA (SDIRA) account: Typically, earnings within a Roth IRA, including interest and gains from investments, are tax-free as long as certain conditions are met.

As I said, S-Corp taxation is not my area of expertise, which is why I came here to look for assistance.

I understand LP is preferred over LLC due to avoiding double taxation, but if I plan to stay in the US and keep the money in the US, do I still form a LP?

You have a solution looking for a problemMaybe this guy is savy enough, or had his accountant run the numbers, and taxation isn’t a problem like my personal example.  

It does not look my calculation is right (double taxation on the $2k net income?).

I don't remember when was the last time that I have to go on IRS and/or my local taxation website to file payments personally. 

There is no separate taxation for the LLC if you are the only owner of the single-member LLC that owns the real estate; instead, the LLC's gains or losses "pass through" to your personal tax return.

In order to make sure you're optimizing your tax advantages and adhering to all applicable requirements, even while I can offer broad advise, I suggest speaking with a tax professional or accountant who is knowledgeable with real estate taxation.