Do this quickly because some counties have a time limit on when you can appeal.I recommend you research the market for:- Comparable Property Sales- Condition of your property, including anything that may affect your property's value- If you are really serious, an expert appraisal may be worth the effort.

@Bonnie Low - it's important to know what services you're paying for.

Most importantly, choose a market that aligns with your goals!

I primarily invest in buy and holds, but I do a little bit of everything including fix and flips, airbnb's, mid-term rentals, and wholesaling.

I definitely forgot those important details. 

Important resources(articles, books, podcasts) to review?

As mentioned in a previous comment, REIAGC a non-profit, and everything is primarily run by volunteers (including the Board of Directors), and has been so for over 20 years. 

As a Mexican realtor, I’ve worked with clients alongside an accountant to simplify the process, including setting up the necessary bank account for rental income.Let me know if you'd like more guidance! 

What are the other important parts of having an investment property?

These properties include different foreclosures and those that sell below their market value.