Handling an Enormous First Step

[Alan Roth]

New to real estate and just formed a corporation with two other individuals. One has no experience with real estate, however, does have experience with managing systems with a large company. The other has experience with real estate with multiple units, however, is way behind on up-to-date systems and technology. 

I have taken the responsibility with running rough numbers for multi-million-dollar purchases. I know how to get fantastically accurate estimates for simple single-family deals but was wondering if anyone had advice on where to start for running numbers for 50+ unit deals.

Also, if anyone has any advice on helpful systems and technology - or for managing larger scale real estate businesses to be a valuable partner, I'd gladly listen. 

Thanks. Location: Ohio.