Sounds like you have a pretty poor security system.Even with a good security system, having a tenant provide ID is the first step in a professional screening process. 

He is a realtor that I previously purchased a small portfolio from and therefore had a good professional relationship.

Readers should seek professional advice.

Even professionals “short cut” the process and invest without almost any research.  

Additionally, consider operational costs like cleaning, staffing, and marketing, as they can quickly add up.For management, outsourcing to a professional property manager or leveraging tech platforms for bookings and operations could streamline things, especially if you plan to scale.

That doesn't pass a cursory BS test, and risks the appraiser calling out either fixed plumbing + permits, or a licensed professional remove the bathroom.

Very professional, reasonable fees.

Welcome to BP - this is a great platform to initiate your real estate journey.Dive into comprehensive guides, connect with experienced professionals, and explore a wealth of opportunities that can help you achieve your real estate goals. 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

By a professional estimate I mean having a contractor bid the work, not just me estimating the jobs.