I don't like borrowing over and over due to the costs and headaches, so I'm not best-suited to answer that for you.

I won't say they don't exist, because I know several that are appropriately licensed and can make these loans, but they tend to specialize in lending to well-qualified borrowers that the banks won't touch.

Your wholesaler should have a choice, reputable title company that they can send contracts to and close deals with.

If your objective is to walk away from the 9 to 5 you're going to either have to leverage/borrow or learn how to raise cash to support future purchases.  

My credit score is in the excellent range  and the purchase price will be around $150K, however, I don't want to borrow personally if I don't have to.  

Very first one I did I had to stay in and do the rehab because Freddie Mac slipped in a deed restriction the title company didn't catch until we went to do the second closing (they weren't same day, I was doing the loan and the lender was dragging their *** so I funded it for my borrower)You used to be able to double close, but its limited nowadays. 

If you had to borrow private money, you would probably pay a minimum 8% or more.

From reading you guys post I feel like I made the choice by joining Bigger Pockets

I think that is a personal choice for you to make depending on your long term goals.  

Anyway, those guys can borrow at 1%, so they can pay way more than we can for the property and make out.