I would appreciate guidance on the best approach to this process to avoid any potential mistakes.1.

@Britney DearEven if someone give you a referral, what meets their expectations, may not meet yours.In our experience, the #1 mistake owners make when selecting a Property Management Company (PMC) is ASSUMING instead of CONFIRMING.It's often a case of not doing enough research, as they don't know what they don't know!

She does terrible work with the listing, didn't care about multiple mistakes we pointed out, acted like we were annoying her by asking simple questions, and became defensive and unprofessional when we called her out on it. 

@Tarik Kafel recommend checking NARM.com for professional and licensed PMCs.Also, here's our copy & paste advice:Encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

You certainly can learn everything on your own, but without anyone holding you accountable, learning from their mistakes, and generally a slower learning curve a program is worth it to me.

You can hear real-world examples of how others have built their investment portfolio and (hopefully) learn to avoid their mistakes.4.

They make so many mistakes that just doing QC on their work takes up half of her time.  

You can make some very costly mistake is if you don't know what you are doing.You should be thinking now about where you want to end up. 

That was mistake.

Outside of all the mistakes I made, which are clearly vast, what would one of you seasoned investors say I should do at this point?