I worked with developers and contractors for many years and the best way I saw this type of situation proceed was for the individual to partner with a mass homebuilder - depends on how big the property is - and also partner with a GC to install the infrastructure to the specs of the homebuilder.

In my opinion, the best agents, appraisers, home inspectors, contractors, lenders will utilize AI as a complement towards their existing businesses to spur greater growth and operational efficiencies.

I then hired contractors for plumbing, electrical, roofing, and HVAC upgrades.

Once the interior was stripped and the infrastructure tested, I brought in commercial contractors to handle critical systems like plumbing, electrical, roofing, and HVAC installation.The house, built in the early 1900s, was originally a coal-burning residence.

Quote from @Sam Brock: I'm a contractor and currently building two houses on two lots that I own outright.

Research contractors better Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Getting the right contractors.

How did you find your general contractors in Philly and Baltimore? 

Yes, the contractors were bad people, but there were hundreds of red flags waving in your face and you ignored them all. 

Maybe a contractor whose income varies.