I've added a few things for very minimal cost that guests really love and increased revenue ~34% year over year.

You can't decide which one to choose based on the minimal information you provided.

This helps minimize upfront work and risk, and rental prices are appreciating.The key is investing in a growing market with strong neighborhoods and building a solid team.

For my personal residence - yes, i would love to own it free and clear as it's not an investment but rather liability which I want to minimize as much as possible.  

If you have insights on creative ways to acquire rental properties or storage facility businesses with minimal capital, I’d love to hear from you.

Since you are doing new construction I would suggest making them private enough where guest have minimal interaction with each other.

What I love the most is two fold, the interest paid back on the loan goes back to you, the fees to do this are extremely minimal. 

Even minimally.

If you’re set on a duplex with minimal rehab, an investor focused agent should have a strong network of contractors who can give you quick quotes, so you don’t wind up with any pricey surprises.

Conceptually you want to take an approach that minimizes your need to be on site - and for that reason I would advise against BRRRR.