In this particular instance, it's extremely cold in the northeast and I'm dealing with 2 apartments with leaks/frozen pipes associated with the bathtub. 

Owners will have no power or rights to reset rental rates to market when a unit becomes vacant.For instance right now all your LA Los Angeles rent controlled properties.

For instance, if we bought a property for $160k and put down $32k, could we refinance the rental property at a later date for the entire $160k, so that we could get our HELOC money back and repay the HELOC lender? 

A lot is based on experience and deal size.For instance there is a difference between someone syndicating a 2 million dollar deal and a 50 million dollar deal.One time I saw an office deal 55% current occupancy for 52 million.

Real estate markets are imperfect and generally work with margins, meaning a subject property is often best valued as a range, rather than a single price (for instance $200k-$250k, instead of $225k).

For instance, I am getting quotes in one market of 8-10% for property management for a 36 unit I am considering.

When you are taking down a $10mm building for instance you will need to come up with $3mm+ for the down payment, closing expenses, reserve account and likely as least some type of immediate repair account.

When purchasing a house hack do you run the numbers in the instances of being an occupant and later when you plan to leave the property?

Id suggest getting your own license in this instance, or consider paying an agent per offer. 

For instance, I would not have gone/finished grad school or had the mental room to be geographically mobile, among other things.Long story short, investing just to invest does not always put you in a better position.