The biggest challenge was addressing unforeseen structural issues, which ate into the budget.

While not being specific as to why there were delays (except what we know-that there is a wait on the process of a national builder buying out properties), she said they were temporary delays recently and that they were not permanent.   

I have lenders that can fund in just a few days and are willing to finance up to 90% of the purchase price and up to 100% of the rehab budget, even for first time investors.

His IG videos are low-budget and I have seen grade schoolers make better vids. 

Each path has a specific strategy for becoming a specialist in it.You want to be a specialist.

My PA lease has specific clause on the second matter of your question. 

Let me know if you need help with specific tools or anything else.

Specifically, I am looking at partnering with an individual who owns securities (stock and mutual funds) having them take out a line of credit against their portfolio (SBLOC) at a low interest rate, and using that to purchase properties rather than using a mortgage.

Tardus is "investment agnostic" - they're teaching the strategy, not affiliated with a specific type of investment. 

I want to preface this by saying I'm an absolute newbie when it comes to real estate investing, but the more books and resources I consume, the more I find myself gravitating towards commercial real estate, specifically hotels!