My last note would be to try to buy 3 or less replacement properties, it makes the exchange much easier and you avoid some additional rules.

I have about $100k in capital reserves and can leverage the 2 properties for additional capital, as needed.

If things work out, we'd like to have at least 1 additional property before the end of the year and have 8 in 8 years.

My goal is to live in the home during the winters, maybe 3-4 additional weeks for vacation, then rent it out to help cover the mortgage the rest of the year.  

Just be sure to clarify that she isn’t a leaseholder but is authorized to reside in the unit.If you’re concerned about liability or want more peace of mind, you could ask the primary applicant for additional security, such as a higher deposit, depending on what’s allowed under Colorado law. 

In addition, when you have leverage you have the other benefits which @Ali Boone mention.

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.

Making additional payments or taking a shorter term are just depositing more into that savings account (it's not like the property appreciates more by paying down the loan). 

Additionally, I really want to dive into the property management realm and am passionate about connecting and assisting other Veterans and Active Duty. 

Any additional input would be great.