CoC is an, all things being equal, comparison tool between properties.

Question: When buying an old building (constructed in 1900 with an effective build year of 1960), what should I look out for and ask about? 

My investment partners and I have made considerable investments in Mount Airy over  the past few years, worked with a number of brokers on acquisitions and can honestly say not a single one has been able to effectively articulate our neighborhood investment thesis which tells you how challenging the neighborhood is. 

Looks like is passed in 2022, effective this year.

Effective December 1, 2024, ownership of the property has been transferred from Michael Anderson to Electric Sage Brush, a limited liability company.All terms and conditions of this lease agreement remain in full effect, and all payments, notices, and correspondence should henceforth be directed to Electric Sage Brush LLC at the following address:2001 Space Odyssey Dr, Cody, WY 82414This change in ownership does not affect the tenant’s rights or obligations under the lease agreement.All parties sign to confirm the change.

What tools or processes have you implemented to estimate rehab costs more accurately and avoid scope creep in BRRRR projects?

Understand how costs effect your deal.

Use tools like MLS, Redfin, BiggerPockets calculators, and Zillow for cost and income estimates, and enhance research through networking.

I'm using a combination of MLS comps provided by realtor, redfin, and backflip analysis tool.  

I don't have airdna, but i did come across one that similar tool that showed these stats for free, and even showed some of the houses people were trying to sell exclusively on these platforms.