As we are looking for the most cost efficient way to complete this project, we have also spoken to numerous contractors that stated, first we would need to see where the foundation is below the property by completing borings tests.

I remodel a lot of properties and have recently turned a rundown house into a duplex with a 2 bedroom and a 1 bedroom efficiency unit. 

That is not efficient.

LOL Here is the CL link. https://rmn.craigslist.org/apa/d/lake-city-beautiful-efficient-5-bedroom/6997799504.htmlThanks   

Most senior homes and efficiency rentals tend to use them.

Since it is likely not profit efficient for you to hire a bookkeeper.

I’m also curious about energy efficiency rebates and things of that sort since this will be a full rehab with new mechanicals.

Lower expenses, more efficiencies of scale, more opportunities to add value.The key is to start the wheels moving before taking the leap.

I've learned firsthand that even 90 minutes away can create a barrier to efficient management. 

Much more efficient then calling them.