Real life example, You don’t want someone using a circular saw inside on hardibacker...silica dust...toxic.

Have your attorney make it a condition of the contract that the seller deliver one unit empty for you to be able to occupy.

It wasn't until later in life that i realized I could make a career from it, so I'm currently in transition from someone who has made money off real estate projects to an actual investor. 

The home does not have separate meters for gas/water/electric and all the ducting is connected to the same furnace and A/C... the thermostat for the air conditioning and heater is in our unit. 

HOA boards come and go but, if you get a bad one, it can make life difficult for a while.

Security Deposit or Landlord Tenant Agreement will be used if occupant has moved out and unit was damaged by occupant or his/her guests.She's now threatening to take me to Small Claims, which is I feel what I want, but I don't know if there are additional repercussions that I'm not considering.

It is a fact of life every person has to live with.  

I would talk to an attorney and talk about your goals, net worth, life outside RE to figure out entity requirements. 

Subleasing will only complicate your life.

I was hesitant to go for it as it is a big change in my life.