People who buy low down brrr and over do multis -good luck.The days of the wind being at the back of investorS is over. 

I believe that multi-families are a far-far safer and more profitable bet.

I live on Whidbey Island yet do own a couple multi-family / apartment complexes in Yakima. 

-i would bump cap ex up to 4-5% atleast-repairs need to be atleast 10%-vacancy should be closer to 10% because of the number of units-Im not sure what that $40 tenant screening charge is forGenerally speaking, a lot of on market multi's won't be deals to the average investor.

It has been a multi family for 50+ years.Should I be weary of this purchase?

I have 2 old multi's and have found issues with the foundations.

Having a creative background, first as a professional musician and then as music video, commercial and content producer, I never thought I'd be so hooked in real estate investing and the potential that comes with it. 

I'm looking for advice or recommendations for seminars and boot camps on single family and small multi family ( 4-10) unit investing.

Maybe consider investing in multi-family B-class properties.

In the Cambridge-Somerville area, triple deckers in need of repair easily go for multi-millions, you need a lot of capital upfront for downpayment and rehab costs and you are relying on appreciation to build equity - the flip and condo conversion is a popular option in these areas.