2) What main skills or knowledge should I focus on acquiring right now that would be beneficial for my current and future real estate investments?

As well as leveraging my knowledge on business.

You’re able to share knowledge, experiences, resources, and risk.

Since then we've had two more showings, and a verbal offer over the weekend for $235,000 which then became $215,000 because she's concerned there "might" be mold in the house, although when asked by her agent why she thought that she hasn't given any specific reasons...so not sure what to make of that as the house is completely mold free to my knowledge. 

Only buy deals you can execute (you nearly have the team and nearly have the knowledge).  

Her finance background and investment experience are invaluable, and she is very knowledgeable and responsive.

"All in".You can make more money in real estate with knowledge vs your own or borrowed cash!!!!   

If you are more money than knowledge then most of the real estate decisions will be made by the other partners which will make you feel like a limited partner to something you are not wanting to be silent on.

I have enough money and construction knowledge that i can convert both of these apartments in 3 bedrooms!

Would be happy to connect and knowledge share if you are interested.