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 is separate from the protection by Airbnb (and VRBO offers no damage protection)

Upon requesting this information at the end of October via email, my business partner responded that “as previously discussed” this client was more of a client of her own separate cleaning company and not our shared client.

Do you use a service that does multiple credit checks for you so to bring down the price to like $15/each, or just run them each separately for more?   

I think anything held over ten years for the most part, if bought even decently, should turn around, but too few investors are an top of their declining investments. 29 separate doors is a lot to manage.

Hi Mike, Most of the time, management companies and turnkey providers are separate.

So I think moving the lot lines so the house and 2nd lot can be sold separately or even developed and also doing a moderate level renovation could really increase the value of this property overall. 

I would have thought San Francisco is oversaturated with STRs, but that's what several people are doing, buying primary residence and house-hacking a separate unit on AirBnb.

I am proposed GP with development / management experience, however my liquidity is tied up in a separate development initiative. 

My understanding is the key is to keep separate bank accounts and financial transactions.