I am seeking to obtain a line of credit for these so I can tap into that dead equity.

Nope, I stopped hunting altogether when I tapped out in '22.

I keep 100k in real estate reserves and have another 200k in lines of credit should I need to tap for emergencies.

Let me share some insights that might help you evaluate your options.Regarding the HELOC on your SFH rentalLeverage and Risk Taking out a HELOC that taps into most of your equity can amplify your purchasing power, but it also increases your financial risk.

Africa is "THE" resource goliath and China is leagues beyond everyone else in tapping such.

I plan to to rent it for 3500 when the time comes (first floor with basement)We are currently looking for our next multi family but just need to figure out the best route forward for financing the purchase.Use our own money, tap into the equity here, refinance here out of our FHA to roll into another one at our new property, go the Fanny Mae route with the 5% down Multi Family home loan program. 

We have considered tapping into our equity or partnering with someone.

Just in general, that doesn't make much sense.Do you have the the capital and approval to buy a new home without tapping your equity?

To bring this vision to life, I'm seeking to build a team of like-minded individuals who are interested in partnering, collaborate on deals, and tap into the booming Miami real estate market and beyond!

Just as a general number, I think 50k in funds that you can tap without emptying your whole account or jeopardizing your family's future plans, is viable.