Maybe add some sweat equity if I could.

Hopefully things work out in your favor.

IF you have to find someone as a JV or a silent partner or and equity partner.

Do you have a refinance lined up to pull your equity out of the duplex once complete? 

And I had all that equity tied up for all those years.

I’m open to creative ways of funding deals using some of the equity or possibly selling these properties to fund better investments.

And if I decide not to sell the property after 30 years, I would still enjoy significant positive cash flow (due to the full debt repayment), and owe a property with 100% equity in it.So, I know that a vast majority of you guys preach the importance of cash flow, and I’m not trying to convince anyone of the opposite (I’m just a beginner trying to truly understand things).

I would recommend researching "Capital Stack" - this may help you understand the borrower position vs. the lender position when it comes to equity and lien positions in real estate. 

If you have no real equity, that also changes things.Hopefully my reply has you now thinking. 

I guess I should be excited, because I've gotten to a place where I have 4 properties all with pretty good equity (one is my primary residence).