It’s a blessing (the reason you found real estate in the first place) and a curse (you probably get distracted easily on what asset class to focus on).

Based on the info in your post, my recommendation would be to turn these assets into well oiled machines and max out their NOI.

Small multifamily is a good asset class. 

If you're already in a secure financial position, leveraging your equity could be a smart strategy.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

I am seeking a partner with significant financial resources to help bring my vision to life.I am open to any advice or ideas you might have.Thank you, I agree with Jay, you will not find a lender to lend on this type of project but you are going to need to bring in an equity partner.

Prioritize your financial stability.

A financial advisor or real estate pro could help you map it all out more concretely.If I were in your shoes, I'd probably lean towards selling and reinvesting into some more diverse assets, or just more properties, but that's just me. 

Best of luck adding another asset to your portfolio!

Maybe she’s financially illiterate and won’t see what a scam your seller finance offer is, but she did have $100k laying around to buy the property, so probably not.