The book that was mentioned is good resource. 

If you can house hack, that's a perfect start.Here are some resources I recommend to newcomers (not paid for mentioning anything in this post:)Personal FinanceI strongly suggest learning as much as possible about personal finance (if you haven’t already) as I believe strong personal finances is the foundation for a strong real estate portfolio.

After pouring a ton of money in these properties, looking at the numbers, it doesn't make sense for these investors to spend any more resources on them.

What resources would you recommend?

But I’ve been trying to get my hands on as many books as possible, as many resources, podcasts, etc., but I was just wondering from my Bigger Pockets family if there is anything SPECIFICALLY that has helped you take large steps towards the direction you want to go with REI and your own personal careers?

There's not a lot of QB tutorials that are specific to real estate industry but a good RE bookkeeper/accountant should be able to guide you to the right direction. 

I love investing and I would want to guide someone on the way to their well deserved rental or flipping properties.

Don’t forget to explore the rest of the sites (guides, blogs, calculators, forums, books, etc).

She will be a great resource to you.

In addition to spreadsheets, I was curious if anyone uses a checklist when analyzing properties; a series of questions, reminders, and information to acquire as a guide you use?