I hope you are asking two separate unrelated questions, because there's no point in doing cost segregation for properties held inside your self-directed solo 401k, save for some very rare exceptions.Some of the Bigger Pockets experts who operate reputable costs segregation companies are @Bernard Reisz, @Yonah Weiss and @Julio GonzalezSome of the Bigger Pockets experts who offer Solo 401k administrator services are @Dmitriy Fomichenko, again @Bernard Reisz and @Brian EastmanReach out to them and see if they can help.

It should be as easy as converting one conventional loan that cashflows well to a Debt Service Coverage Ratio loan or DSCR.

You pay the contractor for their services and then keep all of the profits. 

Their customer service is great.

And it would blow your mind the massive demand for there service.

Out here we call it the MLS, Multiple Listing Service.

Pure client service.  

In this market there are cabins on their own land and cabins on leased forest service land.

I should note that that I was using Baselane's banking service to collect deposit and rent, and had moved the funds immediately to my private bank after I collected (thank god!).

I own an interior design and renovation service, so I'm ready to skip step one and go right to the distressed property.