I’m a contrarian but I’d suggest Columbus.

I've been informed that completing the course alone may not be sufficient to pass the exam, so I’m seeking advice on how to prepare effectively once I complete it.Currently, my only other resources include a YouTube video, five practice exams, and a textbook.If you have any additional suggestions—whether online or in-person, paid or free—that could help me effectively prepare for the exam, I would greatly appreciate them.

Unless the medical condition meets the state criteria for early termination and that the medical notice does not appear to suggest that, you cannot terminate the lease outright/immediately but that you will begin to market the property for rental and upon securing an acceptable tenant, the lease can be terminated pending a satisfactory property walkthrough indicating no damages. 

I suggest focusing on building your "Core 4" team—agent, lender (one who can finance both the purchase/rehab and refinance is ideal), contractor, and property manager.

If the borrower themselves need weeks / months to get plans and permits for construction, and does not provide all docs in a timely fashion, we can only go as fast as the borrower provides what we need. 2.

My inclination is to suggest paying back the PML 70% of the land proceeds (presumably $168K) at that closing and then hold the remaining loan until I sell the house. 

I've seen many people suggest a cash out refi but I like the flexibility of the heloc.

Your suggestion would be considered a negative cash flow investment.

Airbnb price suggestions tend to run on the low side.

Ebooks, podcasts like @Bonnie Low suggested and start running numbers on every deal you see until you know how it all works.