Deal Analyses - What am I missing?

[Karthik Ramachandran]

Context: I am looking to buy a duplex built in 1900's for 630K. I'd like to tear it down and build new SFH.

I have done the due diligence with the below set of questions. What am I missing from this list that would complete my due diligence? 

Is the location hot, upcoming, transforming? 

Is the price of house align w/ comps or slightly more?

Can I sub divide the lot and get permits for 2 SFH

Do I have a reliable lender to support me in this and a builder that I trust will deliver?

Do I know my total costs: Construction costs, lending costs, miscellaneous holding costs, site approvals, permits and design/architectural costs?

Can I sell the new construction house at the price I have modeled at? Again comps here 

Can I refinance this property after I buy it with hard money?

Anything else that I am missing?