I wonder if it has anything to do with airbnb's push to promote this profile as a new listing on their platform?

Assuming this is a passive business - meaning you are not materially participating - any cost segregation fueled losses would have no impact on your W-2 income. 

In the videos it said to use the business service he promotes: Prime corporate services, so I called them and they recommended that I set up two LLC’s one in Wyoming for anonymity and the other one in the state I reside in: Pennsylvania, so that’s what I did.

@Brian Plajer - while this offer may sound very helpful, it is a blatant violation of BiggerPockets rules against self-promotion that specifically PROHIBIT offering services to investors, publicly or privately. 

(actually exterior first, also lawn, landscaping) You can pay for the materials using money from your HELOC.

Preferably by email as we are not allow to self promote.  

Could an inspector look at the house at that point and certify that there are no asbestos materials inside?

The only quick number there might be is doubling the cost of materials to add in labor, but that's not guaranteed - some jobs have few materials and a lot of labor and others are opposite. 

If you were to partner with another more experienced investor to purchase a short term rental, do a cost segregation, and "materially participate" then you could gain the benefits you are looking for without negatively cash flowing, and you could work out a deal where you maybe only have to materially participate for the first year to claim your tax benefits and then you can act as a more passive investor.

At some point I signed up for promotional emails from a company called Here.