If I had $100K or more of equity in a property and felt that the market could be plateau, I would take the capital and run. 

The property could be in a rough neighborhood, need tons of work, or lack features that renters crave.Beyond the Sticker Price: Unveiling Real ValueTrue value goes way deeper than the asking price.

I notice that tends to DESTROY any potential in a property)

I’m looking to invest in a portfolio of multifamily properties to eventually replace my full time income.

Seller financing does not always sell for more money and if there are big price declines then you may end up having to forecloseMy recommendation is to sell it with borrower getting traditional financing and put that $ in a tax friendlier account than loan interest = ordinary income rates

I live in a nice area and I can still walk for dollars and find lots of leads. 

I explained my situation in a response to @Jonathan Greene above.

You need to have consistent inventory and be a serious player to pull #1 off, assuming you are in a competitive market.

I love doing reno work with the contractors I bring in as I can learn and know the ins and outs of the property but I also want to start getting into larger multifamilies or even just duplexes or low income. 

Normally in a spot like this, we would recommend to a client that you sell your primary residence and claim your capital gains exemption under Section 121, but you have two strikes against you: (1) you have not lived in this property long enough to qualify for that, and (2) I'm hoping you already claimed an exemption on the sale of your other primary residence a few months ago, and you can't claim Section 121 exemptions within 2 years of each other.