Here's an article with additional FAQs on cost segregation studies that you may find helpful. https://www.biggerpockets.com/forums/51/topics/1113749-cost-segregation-faq

Take a look at BP's blog where new articles are published every day: https://www.biggerpockets.com/blog4.

., is that TIC's  appear more attractive than suggested in DST articles.

I hope it helps: https://www.biggerpockets.com/blog/2015-05-25-5-dominate-pro...

For a more in-depth view of the Las Vegas investment market, DM me for a link to our blog site which contains more information on investing in general and investing in Las Vegas in particular.Before I continue, note that the charts only include properties that match the following profile, unless otherwise noted.Type: Single-familyConfiguration: 1,000 SF to 3,000 SF, 2+ bedrooms, 2+ baths, 2+ garage, minimum lot size is 3,000 SF.Price range: $320,000 to $475,000Location: All zip codes marked in green below have one or more of our client’s investment properties.What we are seeing:The chart below is from the MLS and includes all property types and price ranges.We're observing the typical seasonal slowdown in prices and inventory that starts in July because fewer people are buying properties and moving as school resumes in mid-August.Rental Market TrendsThe charts below are only relevant to the property profile that we target.Rentals - Median $/SF by MonthRents had a slight drop MoM ($1.19/SF vs $1.20/SF).

No personal experience here but here's a helpful reference from someone who wrote a blog about different aspects of a 2 flat remodel in Chicago Scroll to "Two-flat journal 6: How to make an all-electric house" - - speaks a little about heat pumps and cost In the HVAC section.  

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

Also, if you take the time to read the articles, would you keep the same or consider making a change.

Interesting article about how the STR market may be doing nation wide.https://timesofindia.indiatimes.com/technology/tech-news/airbnb-may-have-just-told-the-worst-that-many-have-been-fearing-about-the-us/articleshow/112363488.cms

Again, the BiggerPockets store has some books on this topic, or you can learn about it by watching podcasts, reading blogs, and interacting on the forum.