No hard fast lines, but think C class is more Section 8/low income housing and A is more New, luxury type housing.

Simplest rule of investing is investing....investors are spending hundreds of millions building nearly 1000 luxury condos and apartments in the downtown area.

This is a great luxury mindset to have by the way in a market as high cost as Seattle is presently.I sort of look at it like this (and I've read all of the "invest for cash flow books" guidance as welll), I have extra investment cash AFTER accounting for all of my retirement investments, etc. 

Some brokerages may also be a better fit for more experienced agents, or agents that prefer selling in a specialty market (e.g. international or luxury properties).

I love West Palm Beach (and South Florida as a whole) for real estate investment because of the population growth, job growth, no state income tax, luxury development that the area continues to see, and a lifestyle that people around the country seek with remote work becoming more and more popular.

Luxury 2bed 1bath condo in Arlington TX for the MTR investment strategy.

Some people call them luxury vinyl tile.

With the new Avalon housing and a new luxury housing builidng under contstruction near the train, I am thinking Ossining will see appreciation in the near future.  

I am planning to remove carpet and put luxury vinyl planks...

But generally (during a recession/correction/downturn) the luxury/high-end market is the first to get hit.