One important item of a good answer would be knowing your goals  If the answer of yours is that these are on a short term investment I would tell you to sell both units if it is a hot area and is a sellers market there I would probably say to sell both of them as soon as possible if the seller's market continues and I might not spend your own or borrowed money before you sale.  

My goal is to create multiple sources of income.

My goal would be to purchase a triplex/quadplex in the next 2 years using FHA and house hacking, but with such a low down payment, I can't find ANYTHING in the majority of LA county that could even remotely be positive cash flow.

You could use the BP calculator (5 times for free membership) or find some available online for free.The most important thing that is going to get you ahead: commit to do 1 thing at least every day that is going to get you closer to your goal of acquiring and creating wealth through real estate: read, analyze, go to open house....

It's as useful as stories about how someone else found their true love.However, it's worth discussing your specific circumstances and goals one-on-one with a good tax or financial advisor.

Talks about thinking deeper about our goals than just metrics.

My goal is to teach new investors how I did what I did.

After reading a few books and learning more about real estate I would define your investing goals (flipping, wholesaling, multifamily, etc...).

Meaning while I'm meeting goals, I'm doing so in a timeline that's pushed out too far IMO. 

And since I didn’t have to wait for other people to give me an answer, I actually moved ahead much faster than other members on the forum who need to be spoon fed the simplest topics of real estate that ca be taught to you with a few clicks on your keyboard.