I would also like to know what effect business structures have on taxation (LLC/ LLP/ LP).

If you do not sell all units you can benefit from the capital gains tax. At

Doing this would likely render your SDIRA invalid and could cause all kinds of trouble like taxation/penalties etc.   

If a foreign investor is in the U.S. frequently or for extended periods, they could meet the criteria for this test and potentially face U.S. taxation on their worldwide income.

Yes I believe so,As the US cycle of austerity begins to show up in the economy, we’ll see (as we do now) policies that’ll not only increase taxes but apply “taxation by other means”.

I recommend finding an accountant who specializes in real estate taxation and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

I imagine this has something to do with taxation, so I would advise a CPA. 

Plus, it simplifies the process of adding partners for future projects and helps keep your finances organized.As for BRRR, you can also deduct expenses and LLC income is reported on the owner's personal tax return, avoiding double taxation that corporations face.

I recommend finding an accountant who specializes in real estate taxation and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

This setup will lead to higher tax prep fees and if you refinance these properties the IRS will consider this selling the property and you will have pay taxes at the end of the year on a property you didn't actually sell.I recommend finding an accountant who specializes in real estate taxation and tax planning and set up a paid consultation before you do anything.