Be careful too, the IRS is starting to watch these (and audit them) a lot more and if you make any mistakes and get caught they will void the entire thing costing you a ton of money and losing your IRA so be careful and work with the right experts.

After all, I am not the one who will be at YOUR audit.

. :) But seriously, there are so many traps to SDIRAs in RE; every SDIRA file I've reviewed the client / potential client has done something that would likely invalidate the tax treatment of the entire account on audit.

Mileage and home office deductions raising red flags for an audit are both myths.

You must be able to demonstrate that you had the intent to hold your relinquished and your replacement properties for rental, investment, or business use in the event you are audited. 

Then the audit happens.

Since they are slow payers, we didn't notice this we did an internal audit.  

Usually when I provide a STR audit with some suggestions, they then yield a boost of 20%-30% occupancy.

Audit support is included.

Talk to a CPA before doing what you are considering, because from what you have described this would be trouble if you are audited.