I just created an income producing asset creating $600/month in positive cash flow with none of my own cash invested.  

Fortunately the appreciation has produced outstanding overall returns.  

To your second part of the question: Most multifamily will be tenant occupied, which means they are producing income.

Can you offer tips that aren’t going to produce properties that are on every list imaginable?

.-- How many active tradelines produced that credit score?

It's not often that a low producing property recovers that much.  

One theory is that the investors see population increasing in these areas and are willing to deal with the ridiculous local laws This actually isn’t even necessary true, the placest with the biggest per capita housing production or “investment” is in the sunbelt, the expensive cities produce a shockingly low amount of housing, obviously zoning laws play a huge role in that as well, but even when you looking up institutional investment in existing properties it’s mostly in the sunbelt, most people who own big buildings in hcol areas just bought them decades ago when they were much cheaper, even D.C. has has like a 4-5 fold increase in value in some areas in the last 15 or so years.

SFR will initially produce zero income (unless you rent rooms or until you move out.)typically investors that consistently buy multiple homes a year are experienced in the REI game with lots of connections and access to cash. not always. but more often than nothappy to discuss your investing goals more

The property produced $48K gross over the past year.  

You will want to run projections on each individual property to ensure that it will produce enough revenue during peak season to cover your low season months.