I think most of us are a little more flexible than all that, however I also think that establishing a plan, and consistently sticking to it is very wise.

I know they hold their loans in house, so they have lots more flexibility.

(if they only require 15% down on a single family home that is usually a good sign that you are working with a flexible lender) Can I change title to my LLC?

Strength of borrower, strength of project and how much red tape or flexibility you want will also have factors in determining to go bank (if feasible) or to use private or bridge money. 

in advance of anything passing, I would raise rent to slightly above market rate so i would have more flexibility if anything passes

I self-managed for 6 years and I have a flexible schedule which is why it worked.

I'm primarily interested in buy and hold using the BRRR method, but am flexible to any opportunity that may come up.

@Justin MespeltNormally credit unions have better rates and bit more flexible for HELOC of primary residence.  

Being flexible with the seller and allowing him to remain in the residence after the sale helped us negotiate a better price.

My current end goal is to create a passive, sustainable stream of income that will allow my family and I to travel and with a good deal of flexibility and not require too much time investment per week (would 20-30 hours/wk be an unrealistic expectation once my business is up and running?).