I would like to learn of any potential red flags in the assumptions but most importantly just go over the deal with a fine-tooth comb to confirm my own understanding of the deal. 

If you are doing this for accounting purposes, maybe look into some kind of software like Quick Books.

How do you confirm that the person at the corporation is authorized to sign a lease on the company's behalf?

Since then, I’ve been listening to BiggerPockets, On The Market, and Real Estate Rookie, and I’m currently reading The Multifamily Millionaire by Brandon Turner.A bit about myself:I'm a 31-year-old software engineer looking to become a long-term multifamily real estate investor (REI) and achieve FIRE (Financial Independence, Retire Early).

They also have tools for on boarding investors.There are property managements softwares to help with property/asset management.There are CRMs that help with capital raising and investor automations.I would not focus on automation right now, but on the business of multifamily.

I'm sure there are other software's out there, so just select one and go with it.

Once I’ve confirmed who they (allegedly) are (of the latest wave,) I often call back multiple times, and when I get a live answer, I play music - only then do they get the point.

The house closes when there's a walk thru and its confirmed that you're OUT!

I suppose that’s a better set up than Zillow but I couldn’t imagine giving possibly 40% of my hard work to a software 

So it’s beginning to sound more like they may have all been working together.The SIGNED HUD by all parties we were provided didn’t have the prior lien holder on it, so there is certainly deception, fraud there for knowing but intentionally leaving it off the hud by the attorney for sure and not disclosing it, but otherwise no, I’ve not confirmed yet if this was all of them working together or just gross negligence on her end and then a situation between borrower and lender no one at the time knew of that just happened to be multiple issues that were later discovered because of one mistake of the closing attorney when the lender and borrower might have thought it legit was closing and no one would have known and then all would have been fine.and yes, TO THE PENNY, the amount they needed from me ended up to be the EXACT amount which was then wired to the lender to satisfy their lien, BEFORE FORECLOSURE BTW.