For example, could I use my SDIRA to operate a management company that charges my holding LLCs a management fee?

It is much faster than sanding. 

Investors want to hear good news fast and bad news even faster... 

Legitimate lenders may charge a small application fee (around $250) to verify you’re serious, but if someone’s asking for thousands with no real intention of closing, that’s a huge red flag.On a more positive note, there are creative financing approaches out there.

Shortly after the crash my tenants learned that condo developers were renting out luxury apartments in the area for around the same rents I was charging so I was forced to lower rents. 1200/apt 2 1050/apt3. 

Well, free of charge.

What are they charging per night? 

Their main sales pitch is that they will teach you how to make more money by charging your investors double the industry average acquisition fee.  

Responses are a month faster than a company doing it for you. 

My absolute best advice with ANY STR prospecting is to contact the municipality in charge of regulating that area of region.