Would like to become more savvy in the multi units properties realm separate from some of my commercial properties tenants who have excelled in that type real estate.  

Even if they are locked in does not mean anything they can change them anytime they want these lenders are not regulated like Owner occ lenders thats the bottom line.. it does affect their crediblity i suppose and risk of them getting trashed on SM  but its their money thier rules.You're correct.

For example:"I deeply value the relationship we’ve built and appreciate the excellent service you’ve provided in the past.

I prefer building my own spreadsheet on Excel and fine-tuning the specific expenses myself.

Have about 50k I would invest (access to more), with excellent credit and good income too, from my full time job.

Lucky for you, your own backyard is an excellent (and often overlooked) place to begin investing, thanks in part to Tuscaloosa’s proximity to Birmingham, UA’s steady enrollment growth, and the market’s favorable rent-to-price ratio.As for your comment about BRRRR, you’re right that it’s definitely one of the more time- and labor-intensive approaches.

The course came with PDF texts (not books) and a very lengthy excel sheet to memorize and tackle on my own.

Worse than tough actually.I would love to see your Excel spreadsheet with the numbers on that path.Well let's see what others think.

Ben Russell has done an excellent job of covering differences in the lease.

It is not very difficult or complicated to evaluate commercial real estate, there are plenty of good books available that can teach you how, textbooks, online courses, community college classes, even excellent youtube videos etc, and it is actually quite enjoyable in the process to learn.