Great day to all,I've just been soaking up all the online youtube videos from Bigger pockets one after the other and I've made the determination to scale my business massively using the multifamily addition into our (wife and I) portfolio. 

Suggest you go to their site, there is approx 7 videos for you to watch to see if you want to go to the next step. 

Lol It only takes a few min to setup online bill pay from your LLC bank account.

I am not finding much material online or a book to study from.

My first piece of advice would be to always be networking with other wholesalers/investors both online and offline.

So, if you don't know how to build financial models, there are some available that are pretty good online (adventures in CRE is a great resource).  

In this video you do not see Jerry Nortons face like in his other videos only hear his voice.

I've read numerous guides and watched many YouTube videos, so I have a good theoretical understanding, but I'm still unsure about the best way to start investing in U.S. real estate.My plan is to begin with long-term rental properties and then eventually move into flipping and the BRRR (Buy, Rehab, Rent, Refinance, Repeat) strategy.

Everything you need to learn/know is available online for free.

Rewey: There is a video (free on YouTube) by Attorney Jeff Watson titled "How To Do a Subject To And Do It Right" that I highly recommend.