And since you have a low interest rate more is going to principle. 

Moreover it will make it nearly impossible to grab a better investment as forking over nearly 10k/year in cash makes adding to your portfolio (stocks, bonds, real estate) nearly impossible unless you make very good wages.If it's inclusive of all expected expenses, you're in a good position and you should probably hold on to it. 

To invest in real estate, set clear goals, consider your timeline and risk tolerance, learn about financing, analyze deals using rental property calculators, consider house hacking, network with investors, create a financial plan, stay educated on local market principles, and start small with a single-family rental or duplex.

You won't get a stock website and have leads start flowing in...just doesn't happen in a crowded industry.

Not 30 days later or 60 days later when you go find the money or borrow it.Every jurisdiction is a little different as to how things work, but typically you won't be able to borrow your way into tax lien/deed investing unless you are borrowing against other assets you have like life insurance, home equity, 401k, stock margins, or some other hard asset.   

Some of his principles are helpful (10x thinking big) but hes a lot sizzle without the steak. 

For example, stock trading became more widespread with the advent of online brokerages.

This is useless unless the investor has a foundation in or has first been educated as to real estate principles, real estate law and real estate finance.

The cash from those businesses goes into stocks and RE for safe keeping. 

You'll never make money if you don't follow these principles.