Additionally, we are digging into BLS data to compare already existing data.

Aside from that the biggest value add areas I see are as follows: Kitchens, Bathrooms, decks/patios (if added), additional rooms/bathsKitchens and bathrooms tend to be the go-to, but all of those can help you get the most bang for your buck. just keep in mind that if the area is already of high quality, then it may not be the best area to spend the money vs something that is blaringly in need of an update.

Make sure you spend a lot of time reading, learning, and meeting people before making the first investment.

Here's an article with additional FAQs on cost segregation studies that you may find helpful.

That no additions or remodeling was completed without a permit.

If you need any additional insight, feel free to reach out.Breeya Johnson 

I would look through emails or texts to see if you have any additional evidence to support your side.

I will answer as it relates to traditional BRRRR, in the general case there are additional options.  1) Do not perform maximum cash extract.  

This will give you a clear idea of what the house might be missing, and or need and gives you time to make those changes/additions before your first group.Another tip: I think it is natural for bigger properties to have more vacancies during the week/slow season.

If we decide to refi in 3-5 years, though, we may time a couple of the leases to end at the same time and spend ~$6k to tear 2 rooms down and rebuild them.