Although not 100% accurate, it will likely be the easiest way to split it.

Accurate books for a seamless transition during tax time. 2.

If anyone knows how I can find the most accurate resources or can share their experience, I'd really appreciate it!

They should also be able to provide comps that are accurate and an ARV that is realistic and hopefully contractors that can give you real world estimates. 

Quick question: When you evaluate a property, what has been the fastest and most accurate method for you, especially for those who invest in multifamily or industrial properties?

After finding more accurate comps a rough figure of $2200 arose for whole house rental in the area.

Hiring an Architect to look at your problem and paying for 2-3hrs or spend 20+ hrs trying to figure it out and still may not know with certainty if what they came up with is viable, feasible or accurate.    

How have accurate books / outsourcing bookkeeping helped you in your business?

BBB is "okay," but not always accurate, and any complaints fall off (not shown) after 3yrs.Even Angi (was Home Advisor), while not great for providing leads (direct knowledge), they're sticklers on the Reviews. 

He claims they all pay accurately and on time.