This thought led me into studying about becoming financially free and building generational wealth.

Do a case study.

Study the market.

Multiple investors with decades of experience, some GP, some LP, some skeptics about the entire business in general sense and some bulls who have gotten rich from investing have all chimed in on this you got links to specific case studies from Brian Burke, a seasoned syndicator, a guy check from Melanie p, who makes it a part time job taking the trash out and exposing the shenanigans of one syndicator after another.Greg Scott has an excellent reputation on these forums, and provides a counterpoint to Melanie’s skepticism.

Study the market.

As a result I must Study the market and know what i’m worth. 

Study the market.

https://nationalmortgageprofessional.com/news/study-reveals-....Not sure BP will allow that link to post, if not just google " 10000 saved using a broker vs direct lender" and you can find the article.On the flip side, there are some banks and credit unions that could offer products that they do not allow to be brokered.

Additionally you can do a cost segregation study and get a lot of depreciation benefits to offset the rental income (and potentially other income).  

When you have a duplex and tenants on both sides stay for ten years, it almost guarantees that something isn't right.I would study your market and determine the value of your rental, because I bet you are losing money every month.