When you say flat roof, hopefully you have a slight slope, because there are "flat" roof systems using modified bitumen (peel and stick nowadays) or tpo.

Starting smaller has several benefits; if you made a mistake, you did not go all in $ wise, not as much demand on your time, lets you figure out what 'systems' you need (for the property and yourself), etcBest of luck,Oren

I’m currently looking I to a property which has a septic but no septic records are found within the county’s health system.

I've heard of areas where there are multiple MLS systems within a single county.

building systems to become more efficient 

I’ve learned through me other ventures that it’s all about systems and processes.

Have systems in place for EVERYTHING!"

Other investors already taking advantage of the system.

I would start with buying one and focus on ironing out any kinks in your system.

How did some of you great investors make this a business with the right systems and processes to automate and scale properly?