My house is finally ready.  The 1900+ square foot 3/2 is fully furnished, has WIFI, new appliances, new smart TV.  Of course electricity, wood for stove, gas, water etc are all included.  The home is paid for.

Since I will be available everyday literally next door for maintenance, guest assistance etc (I am retired) what are my options tax wise...I believe I can treat the home as a business or as a vacation home for tax purposes. (My family stays in the home when they visit)

What are the pluses and minuses of each tactic.  Which tactic allows me the most flexibility regarding the personal use of the home?