This is ultimately a very broad question. 

Ultimately, it's about ensuring the property remains attractive to tenants and maintains its market value without pouring money into upgrades that won't pay off.

Here are a few I recommend: "Rich Dad, Poor Dad" by Roberto Kiyosaki; "Set for Life" by Scott Trench; "The Unofficial Guide to Real Estate Investing" by Spencer; "The BiggerPockets Ultimate Beginners Guide" found here on BP; "The Book on Rental Property Investing" by Brandon Tuner.

You can dive into the specifics of that here if you'd like to see why they jumped so high YoY.What I'm saying is, HOAs are a lower entry point of course, can be lucrative if you analyze the deals as traditional long term rentals....BUT, you ultimately have little to no control over specials assessments, HOA fee increases, and even rule and regulation changes that can impact your investment.

I had to deal with my insurance company to get one month of rent reimbursed for the first tenant that ultimately had to be evicted.2.

Start with BiggerPockets Ultimate Beginners Guide (free).

I wrote a really long piece on due diligence you might find helpful: https://www.biggerpockets.com/blog/due-diligence-ultimate-gu...

Ultimately, PriceLabs is a tool - it's only as good as your configuration and use of it.

Not many on BP will have gotten there with no debt.But, conversely, many who are or have been retired choose to pay all debt off.There’s an approach to get you going, and an approach to feel confident in early retirement.Many investors who dont know what that inflection point is will continually leverage thirsting for more, and ultimately wish they’d listened to Dave.

Ultimately, the best choice depends on your preferences, budget, and maintenance preferences.