BiggerPockets isn't the only online source for RE calculations.

You can also check their reviews online at Google, Facebook, or Yelp.

Do they say that about Bankers, Grocery Store Owners, Doctors (well maybe doctors..bad example) plumbers, etc?

If you're a prospective buyer of a multi-family unit, here's another tip you might find useful when you're kicking the tires on a prospective property.Don't just look at the currently occupancy, check the eviction filings for that property address (it is probably public record at the courthouse - depending on where you're located). 

I can't find many reviews online.

This is the best website to help you learn online about investing in RE.

All I've seen online was very positive stuff, but maybe we are biting off more than we can chew for our first investment.

Pro Tip: The best way to learn this approach is to get your hand on some old appraisals and learn exactly what an appraiser does to determine value. 

Any tips/advice would be greatly appreciated. 

That being said, many of the courses from the MA in RE degree you outlined are offered online and in person in NY.